I think the second film was better, and more intellegently scripted and directed, but this new film is pretty good. I had a few issues with it.
Like, when Magneto moves the entire bridge and twists it around, he completely tears it off its supports. My question is - how the heck does the bridge stay standing after that. I was thinking magneto was holding it up with his powers, but there's a certain point at which that explanation is not valid. There's no way that bridge would have been standing after all that.
There were alot of other problems with the film like that - gratuitous use of deus ex machina, and just lots of sloppy directing of that sort.
It was still alot of fun, and the Phoenix was awesome. Magneto, as always, was freakin cool. Juggernaught was a neat addition, but they didn't use him as anything more than a plot device/filler. He really added nothing to the film, other than a few wonderful one-liners.
Overall, not great at all, but still worth watching, for sure.