I got 33 million on it today.Completed all the hero modes and was starting to make good progress on the villians.
Got the nightcrawler mode as well, it is really cool with alternating shots between the two ramps, very hard and the animations and audio on the mode are outstanding.

Well done. I think my best was apx 23 to 25 million before my hands started to hurt from playing it for a good few hours.
It is very hard to play the game properly when u cannot hear the audio n commands because of 100 other machines are all turned on and being played around you. I reckon that the game is a huge winner already. When they add game code changes etc, it will be make a great game even better.
That machine gets flogged from early morning til midnight in that location, 7 days a week, non stop.
I sort of feel sorry for the poor bastard.    Its running marathons everyday without rest.  
Perhaps a good example of how good STERN are building these commercial Pro models.