I think it's an interesting game. I think the story line is better than Diablo II, and while the game mechanics are similar to Diablo II, who really cares? As long as you feel it's entertaining then that's all that matters.
I'm playing it on a Dell Inspiron 6000 laptop, 2GB Centrino processor, 1GB RAM, x300 graphics card. I started playing it at 1920x1200 widescreen resolution, at medium settings. It was a little choppy. I dropped the resolution down to the next lower widescreen option, 1600x1200 I think, and it's not choppy at all. The graphics are still good for me.