I have had very good results with the FF Test X180. The only other T-boosters I've tried are tribulus by itself and Tribulus Plus (from SuperSup, not 100% on the name. I already recycled the bottle.) It was very hard to tell how much the other two were helping.
I took the TX180 for only 1 cycle (30 days/ one bottle). My results that month were DRAMATIC. At 40+, the little pudge around my waist has been my curse and was the reason for looking into a testosterone supp. in the first place.
That month my waist just melted... almost completely. At the same time, I bulked a little more than before. Believe it or not, I was still keeping up my habit of a couple beers every day, too.
At the end of the bottle, I didn't have time to order more in time so I tried the T Plus which felt more like a multi-vitamin. There's no comparison. So I have 3 bottles of the TX180 on order. Will post about continued results.
My diet during that month did change slightly. We shifted toward a paleo diet a bit (no grains, processed food). My calorie consumption per day was down about 10-15%, also. My workouts were the same. Bodyweight dropped 5 or 6 pounds.
I found SR because the guy at my local supplement store relies on SR reviews to sort and select supplements for himself.
I wanted to write this because good products should be shared, right? Also, I read some guys dissing the TX180 when they hadn't tried it.
I rated this 8,8,7 because there might be something better that I haven't found yet. So far though, this has given me the best results.
FYI they do offer samples and specials. Just manage the auto-ship scheduling.