Am yet to play this but there was a game I used to play quite a bit called high noon or high noon 2 which is made by the same developer and is basically a western version of this. High Noon was actually very fun, though a little simple. You would engage in PvP fights where using tilt controls you just shoot at each other and try to get headshots and simply kill the other guy befor he does the same to you. There were loads of guns, outfits and powerups to buy and didn't seem very free to play.
Anyways the game is fun and free so I'd recommend High Noon 2 and this. I can't find this in the UK store though so I guess this is soft launching somewhere.
Holy crap that turned into a long post