It comes down to personal prefrance. I have use all the products I'll link to. All have differant advantages.

http://www.urineluck.com/product_det...60de46c91c3234 Synthetic. Best for randoms, no mixing needed. Heat and pour. Will not pass the extreemly rare IgG test. IgG test requires signing another form and is NOT part of the standard drug test.

http://www.urinator.com/ Synthetic. Mixes instantly. Mix and head and pour. Can be used for randoms. Urinator device not needed, but works very well if $$$ is no issue. Will pass the IgG test. Cost less than Quick Fix.

http://www.pretestedurine.com/ Frozen fresh human urine. Must be kept frozen until needed. Takes time to thaw and warm. Will not work for randoms due the prep for use requirments.

http://www.ureasample.com/buy-drug-t...?idCategory=22
Freeze dried human urine. Requires mixing. Can be used for randoms.

http://www.pass-any-urine-drug-test.com/ Both fresh and freeze dried human urine. Freeze dried is more expencive, but ask about price guarentee. Better customer service, in my dealing with, than UreaSample.

As for delivery systems. Only Urine Luck Quick Fix is acceptable to me. I V bags are a BIG hassel. The 'mix in the zip top bag' from UreaSample leaks and the vile supplied will ONLY hole 60ml toped off. When you try to open it after filling, it dribbles and spills. If using the freeze dried, transfer the dried urine into a 2 dram opaque glass (cocaine) vile available at any head shop. In the glass vile, it will be free from moistier and last up to 1 year.
IgG test is for the human IgG gene/DNA and used as a urine validity check, but reguires a seperate concent form because it is a form of DNA/genetic testing and thus EXTREEMLY rare.

Post any questions you have. N2