Ok, I watched Part I today on blu-ray. Overall, I was pleased. I mean, you cannot expect the kind of quality possible if the movie was shot with a modern-day HD camera - so, all in all, the restoration (of I, at least) was pretty good.
Though, while some of the scenes blew my mind (particularly outdoor scenes), a few scenes looked like they weren't restored at all (a scene with Michael and Enzo the Baker still had those lines every now and then that older movies seem to have).
Still looking forward to II tomorrow and III the next day!