Also known as X-Men Origins: Wolverine, and thoroughly enjoyed it. It was way better than X-Men 3 though that's not exactly hard to do. Not quite as good as X2 but possibly on par with 1. It didn't even fall into the trap of too many plot lines running at once like Fox's recent Marvel films have done and they seem to have learned lessons from Marvel's Iron Man and Hulk.
Apparently the movie has different Easter Egg endings depending on the cinema, I got one in Japan. Now I'm all for the next Wolverine movie happening in Japan, its a genius idea, but this ending was shit. Apparently the other one is with Deadpool and I feel ripped off.
Speaking of which Ryan Reynolds wasn't in the movie enough. I was loving his Deadpool from his very first scene, if even one thing gets commisioned after this it better be Deadpool.
The random character apperances in this are brilliant, they're very careful to not let Cyclops ever see Wolverine and the little cameo at the end was brilliant and incredibly well kept. Although the CGI for it was rubbish.
Watched X2 straight after it and they did a really good job of making Wolverine a really good prequel to this movie, but then I got annoyed at how how much they fucked up X3 and ruined all the potential that was set up.