AFM is the game I played on location in 2000 that got me into pinball (second game was RFM 6 months later and I love it too but I do like AFM more). The art style is timeless. The speed of the game is great. There are lots of goals both for the rookie and the pro. Likewise it's fun for the newbie and experienced player.
Regarding some of the discussions on price, I was lucky to grab the one I have before the cost was higher than a new Stern. Everyone has thresholds and limits. For me, it's hard to justify paying more for a used game (plus maintenance and re-shopping) than a new one. MM was well over $5k when I got into the hobby and while I love the game I'll go for a new Stern (or two!) instead of a MM (or CV, TOTAN, etc). I'm not saying new games are better (I really like some recent Sterns) but it's something I consider.