Those leaving negative reviews should READ THE DIRECTIONS! Take 3 pills a day at the same time each day (not two a day!). If you don't follow the directions, you shouldn't expect great results, and this goes for ANY supplement. I'm on my third week of this, and I've experienced great results so far. I'm able to do more weight and more reps every time I go to the gym, and I'm definitely getting fuller muscles. I'm getting my testosterone checked soon, so that will likely be the real measure of whether it actually raised it or not. I'm also drinking at least 2 protein shakes a day, which likely helps with the gains as well. I should also say that I'm almost 40 too, so my test. is going to be less (when starting) than someone in their 20s...so this product may not actually do much for someone in their 20s or teens. Lift heavy, eat right and get plenty of rest, and A-50 should definitely help.