We have owned one for about 4 or 5 years now and I still really like it. From what I understand movie sucked but I think the pinball machine is a very good machine overall and like Shaq Attack you can normally find them fairly cheap.
Waterworld & Shaq Attack are probably still two of the best deals in pinball right now if you can find them at a price in line with Boston Pinball average. Neither are great games but both are lots of fun to play and non pinball players seem to love both.