Last year when I was on course and had lots of free time on my hands, I did a cycle of the original USPLabs OxyElite Pro, the one with yohimbe which is illegal in Australia, it also has DMAA in it which is illegal now but at the time wasn't. I found a bloke that sold it in Melbourne and bought a bottle, and my missus in WA bought 2 bottles from the same bloke. Took 4 weeks for him to "acquire" it and ship it down to me, I thought he might have shot though because he didn't answer any of my calls or anything. Anyway at the time I was weighing in at about 87kg's and at 5' 7" this wasn't ideal as anyone would know the military only care about BMI not muscle/fat ratio's.
Anyway started the cycle like it says on the bottle, and was doing 30-45 minutes of cardio 5 days a week plus some weight sessions when I had spare time, after 4 weeks which is the cycle I was 73kgs. I looked pretty good but yeah, **** is potent as anything. Will absolutely shred you up, the side effects are pretty intense though. You sweat all the time, which is ok for me because I sweat all the time anyway, but you constantly feel hot which can be pretty uncomfortable but that seems to go away after a few days. You need to drink 2x-3x the water you regularly drink or you will feel sick. There were a few times when I would be on parade and would feel ridiculously dizzy but that can happen anyway when standing still for a few hours. If you take it past maybe 3pm you can have trouble sleeping, I never had that issue but my girlfriend did.
If you look around you can probably still find the old formula for sale, but I must mention I did try the new formula which is a powder and didn't get anywhere near the cut I did on the old one.