My first round impression:
Feels like a competent shooter ruined by my inability to twitch-aim. If someone is moving I cannot shoot them. It's hard enough trying to play analog shooters in the first place, trying to do it with the Vita's incredibly small and low-movement nubs is almost impossible, especially when you're put up against bots that have no issue pointing perfectly at you.
It also has that god-awful COD-esque habit of purposely spawning you next to people, I was consistently killed immediately after spawning, and the other god-awful COD-esque habit of getting killed from behind /constantly/.
Seemingly no way of leaving a lobby once a match is over outside of closing the game? Forced touch control is poop, why can't I buy guys with the buttons? Why can't I do anything with the buttons?
But maybe I'll warm up to it..not the second part, though.