I choose my test boosters based on what I'm looking to get from it: strength, size, mental aggression, power, etc.
Took a run with TestoPRO about a year ago - this I look to for getting a full, sizeable increase in my physique and add push a few more reps to hit the mark on big lifts. Cognitive energy and approach are on point. Thinking to stack this off season with IGF-2 and NeoVar.