i didn't.
my vita backlog is way too big to buy new games at the moment. i bought everything i wanted at day one, but during summertime i don't feel too comfortable when i play vita on the train. so no, i didn't buy it but will do so later.
must-have-list for platforms i don't own yet:
WiiU: Donkey Kong
XBone: Dead Rising 3, Ryse