I'm going this afternoon. Did you see it in 3D and if so how was the effect? I know it was actually filmed in 3D, not converted later, so it should be good, but I'd still like to hear.
Also, I definitely think the best visual effects come from combining CGI and practical effects whenever possible, rather than using just one or the other. Practical effects have the advantage of actually having something in front of the camera and so it looks very physically extant for lack of a better description, and CGI is good for getting lots of little details and movements that you can't get with a model (oversimplifying, obviously there's more to it, but those are to two biggest things to me). I'd say Christopher Nolan does a good job, but I think sometimes he biases too heavily on the side of practical effects. I'm thinking specifically of the scene in Batman Begins where the train crashes through the parking garage; it definitely looks like a miniature, not a full-scale train, and I think it could have benefited by doing parts of it in CGI.