Yes, for me this game is a "keeper"....I have been a Captain America fan since I was a kid. In fact, I bought the Pro version because he is featured more prominently on the translight than on the backglass of the higher level games.
The year before this game came out, my wife was taking my daughter to see Santa Clause at the local mall. My kid asked me if I wanted her to ask Santa for anything for me (sweet thoughtful kid!).....and I jokingly replied "ask him for a Captain America pinball"....... and lo and behold...here it is.
No, I have not installed any modifications to the sound system.....no sub-woofers or speaker kits. Everything I have done is "visual" (lighted tesseract/captain america shield shooter rod/shield pop bumper covers/speaker light kit).
Good luck with your game....I hope you enjoy it as much as I do mine!!