If it was a game that you didn't already own, would you play it on route? Set on Free Play it might be a fun game to master, but at $1 a game, I find my quarters voting for other games.
I played on 2 different machines on routes with around 30 or so plays total until I lost interest in the game. The machine that I played the most had all sorts of problems (broken Tesseract, flimsy/un-level/warped plastic lanes that caused balls to get stuck, etc.) but both machines felt like they were built with cheaper parts than machines released just a couple of years earlier. When you pull the plunger back and the ball's momentum is absorbed by the flimsy plastics it careens off of, it doesn't lend to an initial positive opinion of the game. This happens on both machines that I've played. Maybe that's by design?
Compared to other Stern games it's just not as fun. The shots are too hard and unforgiving and the rules are too complex (and repetitive) for someone who isn't an expert or doesn't have the machine set on Free Play. I'm not an expert player (or even good), but I've played at least 50+ different games in the last year, from all years and all manufacturers, and Avengers is near the absolute bottom on the list of games I'm looking forward to playing again. Baywatch is a better game than Avengers on all counts!
After the initial "newness" wore off, rarely do I see anyone playing it at the specific bar that I live 5 minutes from that has 8 other new Sterns. If it were a true democratic way of judging the popularity of a game , it would be interesting to see what their (% of total) collections for each machine show?