I will admit, there are some gfx problems. Esp w/ the ATI cards. I myself use nividia, but the main problems is the gfx loading. I also experienced when in an elevator, and you jump, you instant die. Also, the checkpoint system is a little vague, you basically need to save everywhere you go. Which it does say in the tips section also

Honestly though, wait till the big hotfix is out before buying, that way your not disappointed. I assume its a major issue right now w/ the gfx drops, so im assuming the hotfix will be out w/ in a week or so. And also, this game is gfx heavy, so make sure you can run the game at good levels as well. there is a site out there that can test your systems to the game you want to play, its not 100% accurate, but it works none the less. google: can i run it -- should be the 1st thing that pops up
RAGE is a must buy though, Ill be doing a first impression blog article here on it today or tomorrow, check it out on my blog.