I own a Houdini and I have to tell you that it's not a game that I would own as my only game... that being said it's a good game for the reason that it makes you a better player. You can't fake it through this game and just bash everything on the playfield in the smallest bit. It has a different pace, and requires stop and go with calculated shots in my opinion. Development has been responsive to requests, and so far it's been very fun.
To each their own.