A quick and semi-addictive diversion until you play Fable 2. It's tie-in to Fable 2 is what makes it better than ehh...
Overall, if you like gambling and Fable, this should be a no-brainer. That also goes for the completionists mong us (which I'm sure PM and Lionhead were somewhat banking on. In any case, it's better than some XBL games out there as a stand-alone and coupled with the ability to merge your earnings into your Fable 2 character it's solid. With Fable 2 now out, it probably loses it's luster (particularly with the numurous ways to make money in-game) but for the items it may still be worth it for some.