The CGI they used on Patrick Stewart was really bad; in the first movie, I thought it worked quite well, but, here, bad. They'd have done better to just go without it.
Well, they didn't CGI PS in the first X-Men movie because he was nine years younger then.
Why did they have to CGI him at all? I mean, isn't there like, oh I don't know, 100 hours or so of him on video from nearly every possible angle they could've nicked for reference in making the CGI model?
Again, as I said in my review up thread I liked this movie. It wasn't great for me, it wasn't terrible it just "was." It'll likely not end up in my DVD Collection (right now to be a movie in my collection it has to be either really specail or make it onto a Rifftrax... Which means XMOW will probably end up in my collection.

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And I still really like Hugh Jackman's Wolverine -though someone up thread mentioned Kurt Russel which, OK that'd be awesome- even if he's a bit softer than the comic version.
CGI, yeah, was hit and miss but it really didn't stand out as either terrible or great to me just "obvious" at times. (Mostly in the battle atop the cooling tower.)
I wonder if the final battle took place on March 28, 1979 (the date of the Three Mile Island nuclear power plant partial meltdown/accident) and that the "meltdown" was used as a coverup for the destruction of the cooling tower and the events that took place there? I was waiting for that plot point to be introduced.
Though, this would make Cyclops, what, in his late 30s by the time of X1? Which I guess isn't "impossible" or it's "possible" Cyclops in this universe simply ages slower than what is normal. But he really probably should've been a child. Around 10 years old.
Someone above mentioned some anachronisms in this movie, seeing plasma screens in one scene. This isn't too much out of line. It's possible that in this fantastical universe with these bizzare genetic mutations that either we achieved plasma screens earlier or they're only used in secret areas of the government. And, really, did we need late-70s winks to the audience? Like Wolverine going into a disco-club or something? It's a comic book universe. Time isn't supposed to make a great ammount of sense.
Others have also mentioned the use of the name of the Canadian area the movie starts off in. IIRC it's only "mentioned" in a sub/establishing title which could've simply been done just the orient the audience on where "we" are not to say that's the actual, current, name of the place.
It's like in X-Files Fight the Future, the movie begins sometime around the peak of the last ice age with a subtitle that says something like "Southern Texas 25,000 years ago" which is silly because there WAS no Texas 25,000 years ago. So obviously we're not supposed to take the subtitle litteraly "in universe" just use it for reference on where we are.