Snake traps the ball fairly regularly on my early PRO, not sure if they've fixed this in later versions or not (the ball perches on the top front lip of the scoop-hole and is leaning on rear of the flipped up tongue). I've e-mailed Stern and await a reply. Snake tongue can bind metal to metal on the lower 'jaw'. I've had problems with mine since the first day.
Drops are still an issue for me; stubborn to get knocked down.
Orbit post shot bouncebacks are annoying.
Sparky airballs will probably eventually result in something getting smashed. I'm in the planning stages of making a guard to go over this area. If someone else beats me to it, great!