How reliable are at home drug screens?

I posted in a previous thread about being nervous before a pre-employee drug screen (non-dot 5 panel).

after not smoking for a month, then smoking once two weeks ago,

I bought a Quickscreen at home drug test (specific for bud) and was told to use it with my first void.

I went to bed around 2am woke up around 530am, did the test.. came back negative! which is great. With my test most likely being sometime next week, should this give me peace of mind or would you think I should still take some precautions. Or even do another at home test to be sure.

I believe the Quickscreen checks for 50ng/ml. I heard that's standard, but sometimes labs check even lower.

Home test kits are extremely reliable and if you can pass one then you'll have no problem passing your scheduled UA. Morning of the UA, I would drink a 32 oz gatorade and void once before you take the test.

My test was today. I actually bought another test just to ease my thoughts, I passed once again. My test was around 4:30 so I drank a 32oz powerade and about a cup of green tea throughout the day up until the test. The urine had a nice yellow tint to it.

I think I should be good, I shouldn't have to worry about it being over diluted or anything should I?

Also how long do results usually take? I think they send it to ATN.