Ocean's Eleven is a high stake crime caper.
The good. Tight and intelligent scheme with clock-work precision. Well paced, well built scenario. Very interesting story. Funny dialogs and situations. A bit of romance. Diverse characters. Extremely slick finish to the movie. Solid acting.
The actors. A slew of well known names. My favorite interactions are between George Clooney and Brad Pitt: professional, dry, relax and hilarious with no excess. To an only slightly lesser degree, their exchanges with Matt Damon. Loved Don Cheadle's work, very funny. So were the performance of Casey Affleck and Scott Caan as the two constantly arguing and slightly demented brothers.
The bad. It's not bringing anything new to the genre. A few logical flaws, but it took me several viewing to notice them.
The ugly. Nothing.
The result. Excellent entertainment, with a bit of everything for everyone.