Hardware wise it was a fantastic console, I picked an OLED version up a couple of years ago. The problem I always had was the lack of games. There were a handful of good titles but nothing really blew me away. I think I spent more time playing Risk or Rain than anything else.
Back when I was commuting by train every day, the Vita was my favourite console. It felt like it got a lot of great ports of the big indie titles of the time, plus a decent number of bigger titles: Hotline Miami, Spelunky, Stealth Inc, Wipeout 2048, Resogun, Super stardust, Persona 4, Guacamelee.