Been playing this game for awhile and love it. Haven't paid a dime. There are a surprising amount of maps and upgrades! Honestly, I almost caved and unlocked the unlimited gas, Glad I didn't. I have in other games and personally feel it dramatically shortens the life of the game. Phone games should be able to be played in short bursts as well as longer sessions. Death Tour plays extreamly well in short bursts and I assume if you pay it plays well in longer time frames as well.
I would have never played this game if it were not freemium. Looks like a Twisted Metal clone and I have only played one TM clone on the iPhone that was any good (Carmageddon).
Touch controls are hard to get right and a Twisted Metal type game has to have spot on controls. Fortunately Death Tour has fantastic controls as well as big and varied maps. Not to mention a good collection of cars, each with its own strengths and weaknesses. Surprised this game didn't get more love here...