Just finished watching the movie.
It was epic. But I feel that it jumped all over the place in the first 45 minutes.
Too much happened with too little dialogue to give a reason for it. If I hadn't played the VN, I likely wouldn't have any idea as to what the hell was going on.
After they go to Einzbern, everything slows down to a fraction of the pace it had before.
If they would have just made it 30 minutes longer, I think it would have been so much better. Too many funny, character building and epic scenes were skipped (I wanted the to see the scene where Shirou tells Lancer he can't have Thosaka animated). And since it was a movie, they could have at least hinted or suggested at the sexual interaction between Thosaka and Shirou to build that magic connection.

It's a shame really. The movie was cool, but it could have been much better if they made it just 30 minutes longer.

Do but despise reason and science,
The highest of all human gifts -
Then you have surrendered to the Devil
And must surely perish. - J.W. von Goethe