I've already seen it twice!
First I went to the midnight feature with some co-workers, which was sold out, then my wife & some friends wanted to see it this evening so I went back & watched it with them.
It was still packed & there were a few evening shows that were already sold out, which makes me think this will have a bigger opening than Thor.
It was great! I'm glad to see Vaughan & Singer put the franchise back on track.
I won't go into too deep spoilers for now...but there were some things I thought they could've done differently, but overall I really enjoyed it.
some random notes:
There's no scene after the credits, which drag on so it's okay to leave once the end titles are over.
It looks like they're ignoring X3 & Origins Wolverine, or at least some important parts of them. Very cool how they used the same beginning from the original X-Men, though.
There's a VERY cool cameo in the middle of the film that made everybody in the theater scream!
And if you pay attention to the Cerebro scene, you'll see another one.
LT it is indeed Stryker's father in the film.
Not sure if they're planning a full prequel trilogy.
Honestly this seems like a proper set-up for the movies, and I'd much rather see a modern X4 that ret-cons X3 & properly introduces Gambit & Cable (and can anyone other than Stephen Lang play him at this point? I think not!)