This is how it went down for me...

I read and read and read (here) about both options, decided I didn't have to quit because I have a good friend on call who would supply some clean wee.
Got a very nice job offer and was told I needed to go do the UA. No worries, call my friend and met him at his shop...
"Sorry bro", he told me after handing over a very small sample in the travel shampoo bottle I gave him.
Well hell's bells. I took what he had and went through the thought out motions to keep the sample at temp. I'm a commando kinda guy mind you so I had to improvise a way to keep the bottle secured between the legs. I did this with an ace bandage configured in such a way that I truely believe I could have been passed off as a skinny sumo wrestler... not a pretty picture and really not that comfortable OR all that secure. I had also used a store bought heating pad meant for muscle soreness (said it got to 104 degrees or something) and wrapped it around the bottle and then crotched it for the ride to the UA testing center. When I arrived I pulled up close to the front door and started to get out of the truck... well... if you aren't real used to walking with a half assed wrapped up bottle of someone elses urine wedged between your legs, you miiight feel out of your walking element, I.E. you will walk funny! I kept thinking to myself that I must look like a 40 year old nun shuffling across the court yard. Speaking of a nun, I was praying the damn bottle didn't drop down my freakin pant leg.. how would I explain that? "That's where I left it!!"..
I manage to shuffle in without dropping a urine bomb and sign the sheet to be seen, then made my way to sit down... if I didn't feel funny trying walk, trying to be smooth while sitting down changed that... thank god the bottle didn't tip up on the way down. "OH!!!... MY BACK!". As I was sitting there I noticed that the extra package I was carrying didn't feel all that warm, but I just knew that it was all going to pay off in the end...
"Dizzy?"
yes
"Though the door, station three".
shuffle shuffle shuffle
Did the paperwork, emptied my pockets (and yes I was sweating bullets) and was told to go in the bathroom with the cup and do the deed.
I wrestled the bottle from my Sumo diaper and quickly took the temp with the new baby thermometer I bought that morning... BEEP doh... and then the temp... 94 degrees... I waited to see if the temp went higher... BEEP BEEP BEEP went the thermometer, signaling that the temp was as high as it was going to go... 92 degrees. DOH..
"Dizzy, you have 30 seconds"... DOH!
I quickly tried to wrap the cup with the heating bandage, not thinking that with a wide open cup, nothing but an open flame could could actually warm it up... So I suited back up and came out the door to present my prize. A 90 degree cup of urine that didn't quite reach the fill line they requested I fill it to.
"Hmm"
What?
"It's not a temp"
What's that mean? (and how the hell do you know just by looking at the.. is that a temp strip on the cup?? shit)
"Did you set the cup on the floor?"
No
So her co-worker in the next booth pipes up.
"He's going to have to resubmit under observation"
"Sir, I guess you need to provide another sample"
You saw I couldn't even make the line, I don't have anymore to give"
"We'll provide water"
I have a conference I need to be to in 20 minutes and I didn't think this would take that long.
Co-worker "So your refusing to submit a sample"
No! I blah blah blah blah.
"Your refusing"
I'll just call the company I'm applying for, explain the situation and will come back tomorrow.

So I left.
I called the company, explained the "situation" and was told in a somewhat sarcastic voice that I NEED to provide a clean sample because they are under Federal laws which require blah blah blah and I need to get it taken care of SOON.
No worries!
Now here I am, stressed out to the max about the next day and what was I going to do. I decided I needed to try dilution!

I went straight from the UA clinic to the store to stock up on Creatine, B vitamins and energy drinks. I got home and proceeded to get my guts and nerves destroyed. Between the mega doses of creatine and B vitamins I managed to get the runs like NO ones business and the shakes from the B12's... But I carried on, determined to land this killer job!...
/runs to the bathroom
The next day arrived and I went through the same motions as the previous night, Creatine, B12, water, energy drinks... running to the bathroom. I had picked up a pee test from the store and it said there was nothing in my urine, so I went back to the UA clinic.
I arrived with a bladder that was so full that my kidneys started to hurt very badly and I got the news that the fax from the company hadn't arrived yet so I would have to wait... and wait... 45 minutes passed and I thought I would have to pass, I was in agony. I had to run through the strip mall the clinic was in to use a bathroom, I couldn't take it anymore... No sooner than I walk through the door. "There you are! your fax came in"... aww damnit..
"Station 2"
ooook
Luckily my body was drenched inside and ready to pee again.
So I repeat the bathroom cycle using my own wee. First part of stream in the toilet, middle in cup, rest in the toi...
"Dizzy?"
Uhh, yea
"You need to come out here"
I come out to hear that since the request form was faxed in, that they would need to watch me pee. I was told this as I handed over my cup.
Well come on in, I still got some! So I pee again!.. while home-slice intently watched the action... I hate that, but what the hell, glad I wasn't subbing!
So we finished up the paperwork and I left the building wondering how the sample would turn out. Would it be clean? Would some THC make it in the cup since I couldn't use the middle of the pee session to fill the cup? Would it be a negative dilute? And if it was diluted, how would the company take it???

3 days later, on Monday, I called and called to try to reach someone at the company... no one returned my calls. I went to the UA clinic to get a copy of the results... Negative-Diluted).. shit. Then I got in touch with the company who proceeded to accuse me of playing games (which made me feel like complete shit, I'm actually a decent person) and they pulled the job offer... I was devastated.

Fast forward 1 week and another job offer and another UA appt.
I'm going to sub and make it perfect... and I did.

I bought a smaller bottle with the intention of having it filled since I estimated that a bigger bottle and less wee would cool off a lot faster.
I bought actual underwear! Two pairs that were a little too small so the bottle would surely be secured.
I bought real hand and foot warmers, same idea as the thermal pads, but these babies get up to 140+ degrees and they were a 1/4 of the price of the thermal pad, I bought 4 packages so I could test out the operation and get it right.
I also bought a non BEEPing thermometer, get them at a pet store in the fish section. Don't bother looking at the temp strip types, they don't even get to 100 degrees, I think they might even max at 90.

I spent the whole night working out the details. Testing how quick the pads work, how long it takes to heat a luke warm sample, how long the heat stays in with one heating pad, 2 pads, etc etc.

How it went down.
I woke in the morning, immediately opened 2 packs of heating pads.
( They take 2 hours to reach a good heat level that you can work with, 3 hours will make them pretty freaking hot, but still manageable and I would recommend waiting at LEAST 2-1/2 hours before you make the journey to get tested)
I took the donated urine from the fridge and wrapped it in a sock with the heating pads and tested every half hour for it to get to temp.
Once it reached 96 degrees I headed towards the UA clinic and parked out of site while I kept testing the sample until it reached 105 degrees, a temp I was comfortable with to head inside. I also rolled one of the pads in my sock in case I needed the extra heat from having to wait or whatnot.
I indeed had to wait to be seen but also noticed that both the pads were gettingwarm. I finally got my turn in the latrine, and like a pro, I went to work with extreme confidence.
Pulled out the bottle, temp tested, 109 degrees, poured sample in cup, temp tested, 105 degrees, swished cup around and blew over the cup (deffinetly not hot coffee!) watched the temp strip, 97 degrees, dammit, packed both pads on the cup since I want it perfect, cup reached 100 and I packed up the supplies and headed out.

The rest went down without a hitch and I was called 2 days later and told to come into work. :thumbsup:

After all of this shit, what would I recommend?
Subbing.
Do what is preached in the stickies, PRACTICE THAT SHIT! Perfect it, own the procedure! Write down notes of temps, experiment. Practice with water and learn.

Other things to know, don't let the company fax over the request, pick that crap up in person to make sure you won't be watched.

Good luck and happy smoking.