Bjaardker: Good decision to consider picking it up.
It sometimes upsets people when I say this, but I consider balls in the Apex line to be IQ balls, so if you don't have success with them, it says more about your game than the ball itself. The only thing I would suggest is to stay away from leverage drillings in the Apex line (label, stacked), and go more with a CG out type pattern. The cores in the Apex promote a real flippy reaction when drilled overly aggressive, so be careful here.
As to why you don't see more Adrenalines around, I can't answer that. I can make an observation about the disappearance (i.e. turnover) of aggressive balls in general. Most bowler who buy high-end equipment really aren't at a level to use the stuff effectively, and quickly become disenchanted when the balls do not produce magic. So they blame lack of results on the ball and move onto the next "magic bullet" of the month.
In general, unless a bowler is in the 210+ average range and knows how to use equipment as a tool instead of a solution, he/she should not be allowed to buy these monsters. But that will never happen.