BALLY EM's.... the silent treasure! Zipper Flippers are a very cool feature and BALLY em's are real sleepers and a lot of fun to play. I collect all 3 of the major manufacturers.. each have their own feel to them,
GOTTLIEB - far more collectable but GTB70's games can be slow.. floaty balls.. drop targets that dont reset unless you deliberately lose the ball ( High Hand???).. they are not without fault.
WILLIAMS - faster tables, not much in the way of gameplay for the majority but for pure keep the ball alive as best you can.. Williams are the way to go.
BALLY - really sit in the middle of the two... fly through a Bally spinner and listen to the relays keeping up.. they have a great feel to them and BALLY have made some exceptional games.
Ignore this manufacturer and it is your own loss..