Unfortunately I have no sound at the moment, so my reaction is based purely on a visual standpoint...
I'm a little unimpressed, but at the same time happy with the way it starts. The thing that gets me the most is, obviously, the apparent growth of the predalien. Even if these guys grow faster....this was just strange to watch. I guess I was expecting more from the scene on the predator ship. It started well, but once the first guy got taken out it all seemed a little weird. Maybe it was the way it was edited, I don't know. I guess I was hoping for more of a build up to the appearence of the new guy, I kind of assumed at some point the preds would have found scar's body.....did no one come back and notice that there was a gigantic hole in his chest? Or did the predalien really grow in 5 minutes..? That was one thing at the end of AVP that bothered me too...with all their technology, the preds didn't realize scar was infected when they brought him on board. You'd think that would be a pretty big thing to want to check into.
But still, the movie looks very good. I love Wolf's face as he turns around in his chair. I only wish I could have listened to it, I'm sure the music and sound effects add a lot more to the experience. The scene on the predator homeworld didn't go to ridiculous lengths, they pretty much just showed what needed to be seen and that was that.
I think Wolf is my new favorite pred, and I'll probably be sure of it after i've finished watching this movie.