All around, I would call this my favorite PS Vita game. It's quality rivals that of most console FPS games on the market today. I personally enjoy the Single Player Campaign and the general "special ops" missions much better than those within Modern Warfare 3.
However, that is not a fair comparison as everyone knows that your CoD games are only for multiplayer and the single player is more of an afterthought.
The only annoyance about this game is that online play is a $10 fee for people renting or buying second-hand, especially when you can buy the game for download from the PSN for $31.99. Very worth it though.
This game took me from a "give it a chance via rental" to an impulse buy.
Honestly, would have been an impulse buy if the PSN actually had any information about it instead of their legalese BS.