Sonic Unleashed is much better than the past few Sonic games have been (much better than Sonic '06, that's for sure). The werehog stages aren't really that bad actually, although they aren't as fun as the Sonic stages. I just wish there were more Day stages because they are so good.
Note that I am talking about the Wii/PS2 version. Yes, it is pretty much a completely different game compared to the 360/PS3 version.