the only problem i've faced thus far with NFS MW is.......the PSVita's battery life can't last long

other than that, this game is fantastic.
straight to the point:
graphically, it does NOT touch the PS3 version. (come on..you dont really expect an OPEN world game, with ONLINE races integrated into it, on a MOBILE device to touch the ps3's graphics, do you?) however, i would say that the cars do not look as terrible as MK's character models*. (those truly looked like they were ripped from the PSP)
gameplay is sublime-in and out of online races, single player races, what have you, without having to go into menus to do it. (yes, loading does take place, but what game doesnt have loading screens?)
custom music(PS Vita feature,ofcourse..but it is available if you want it)
(assuming you're online) autolog will inform you that your friend has beaten your time in specific races, and asks you if you're interested to beat their time in the same race or other racers they've been in.
finally if you have the ps3 version of the game, you can cross platform share your race points.
*about MK: in no way do the degraded graphics spoil anything about the gameplay. it's fast,fluid and a damn ton of fun. it just doesn't look as pretty as it does on the home console versions of the game.
NFS MW, in my book, is a solid 8/10.
definitely worth buying.
I've always wanted a NFS on the go, and this being open world makes it all the more amazing.
i still cannot believe they managed to cramp all of the home console's NFS MW into a handheld console. absolutely amazing