I got a lemon. the autofocus is the most important aspect for me of a camera. returned 3 times mine and paid for last time for the repair, and still get same result. dont get fool by canon who does the test with the alignment chart, I have've done the test with it and it works under this condition. but in many others the camera just randomly focus back, front or will focus. usually 8 oof out of 10 pict. in studio for example with 1600watts stobes and 500watts bulb for ambiant light tripod 1/125 f8, af center point the camera will just get the eye many times oof. outside during daylight, for some reason I dont know it will sometimes behave well and get all the shot in focus, then taking some pictures again the autofocus will behave crazy and lot of oof. I have 40d 5d and xt and never have this.
then canon service will only do the test with the alignment chart, the problem is, I didnt buy a camera to take pictures of black bars but to shoot models and food products, hopefuly the live view works, however you dont want to use all the time a tripod so live view is not the way to go.
if you get a good copy enjoy shooting. if you get a copy with af problem, return it if you just buy it and get another copy until you get one with good af, otherwise like me you're gonna waste money and time to get it repair and never really get repaired.