I am 6'2 138lbs.Tall and skinny basically. . . smoked for about three years took a month off recently and smoking again for three or four months now. I just took a pre-employment drug test today. I bought a few at home tests to see if any detox products would work so I went and got two bottles of Absolut De-Tox in lemon lime and grape. . . yesterday I drank the lemon lime and followed the directions which are basically the same as most... drink, fill with water 15 min later drink wait 45 min and youre good to go for a few hours. . . .So I take two different tests and fail them both. So I freak out and decide synthetic urine is my best bet well my only bet really so I ended up getting Dr. Green's Agent X simply because it was one of four brands they had , I knew nothing about it or the others because I didn't look anywhere before I went. So I took my test today using Dr. Green's and I'm waiting for my results, I should have them tomorrow or the next day. . .It's super easy to use and although it's 3oz. it wasn't too hard to stow away. So I'll post when I get my results. . .no worries. . .