Glad to be of assistance. P4 works on it, and most vita games do, some of the panty quest rpgs dont work on it. Make sure and check the list of currently supported games here just to make sure you dont want something super bad thats not on the list, but honestly, you should be fine. Heres a fairly up to date list of supported titles
PlayStation TV Compatible Games (North America) | PS Vita Reviews
Youll still need an atrociously expensive memory card, but ps3 and ps4 controllers work, I believe, and you never need to charge the thing. Being able to play p4 on the television set instead of the handheld is worth the cost of admission though.