hell yes it is, do yourself a favour and get one.
and here is what you can look forward to : psp games /psx/gba (I'm playing alot of gba these days using gbakai emu in adrenaline).
and you can also play alot more of the old school games such as snes etc.
and well don't forget about the huge library of vita games, it's a win win.
plus, it dont matter which vita version you get, the oled or the 2nd model both have gorgeous screens.
looks very close to how good the switch screen looks.
(i own both but I'm playing alot more on my vita cause in handheld mode the vita is far better simply because it's so lightweight [note i own the 2nd model and that one is extremely light to hold] good stuff).
go get one.
i use gpsp kai on vitas adrenaline and it runs 99% of the games perfectly.