I like the portable Assassin's Creed game a lot. But it clearly could have spent more time in development. One bug I encountered had an alligator spawn about five feet in the air. That didn't stop me from killing it, though, which left its sad carcass floating aloft as a warning to those would mess with Aveline. Or not apply more QA polish.
We have some discussion threads at Reddit about the game glitches. http://www.reddit.com/r/vita/comments/12jya3/some_fixes_id_like_to_see_in_a_possible_new/
And some people are having their save file corrupted after finishing the game: http://www.reddit.com/r/vita/comments/12jzy5/the_ultimate_ac3_liberation_glitch/