I'm turning 50 this year, I havent tried to many Test Boosters in my past, AAEFX's Test Charge was really good. I'm running a cycle of PNI's Paragon stacked with D-Test [ DAA]. I've noticed strength gains, agressiveness[ more then normal] and libido increased. Sleep patterns are far better!!!!
Now depending on person's age, IMHO, you shouldnt really need a test booster.