I was dreading Olaf hardcore and I was really afraid we were going to get another Hugo or B.E.N (god awful robot from Treasure Planet), but the directors utilized him pretty well. He wasn't in the movie constantly, and they let him stand aside when necessary. I wasn't crazy about him, but I wasn't really annoyed.

That being said I'd much rather people decry Frozen as terrible because of Olaf than because of millisecond long animation glitches that happen in every animated movie.