I think Belov has been good. Especially compared to some of the other defenders. I don't find myself shaking my head over the things he does very often. He isn't flashy or stand-outish or anything, but fairly solid, IMO. There may still be some adjusting going on in his game, since this is his first season on NHL ice, but he seems to be fitting in quite well.
He has this tendency to look lazy at times with his motions, but it doesn't seem to be the same type of lazy that the rest of them play with. He still makes the plays he needs to.
This physical game we heard so much about has been quite sparsely shown, but over the last few games it has been seen a bit more frequently I think.
I think he could be a solid fixture on the 2nd or probably 3rd pairing. We will see how things turn out by the end of this season/early-mid next year, if he gets resigned. Which I hope he does.