I never played this game and waited for a Vita version. I usually prefer to play while in bed. I booted up the game, and while the story and gameplay are superb, the technical issues of this version are significant.
I died so many times because the game freezes for 1-5 secs before you have to take action. So instead of, say, 4 seconds to take action, I actually get like 2.
It's very clear the game was made by - no offence - an incompetent team. The game is superb but on the Vita it's bad and really unpolished and choppy. You should have spent more time fixing it, or given it to another studio for this port.
At the least you should release a patch, but I suppose it won't happen. I'm really disappointed.