I need an opnion from those Canon users that have sent lenses in for repair to Canon. My 24-70 f2.8 developed a stutter in focusing, hunting in low light as well as good light. I have narrowned the problem down to the lens as I tested it on multiple bodies along with other lenses I own. Only the 24-70 has this problem on all bodies tested. Here is my question. I have never had to send a lens or any other gear for that matter in to Canon for repair. Of course the lens is 5 months past it's warranty period. My dilemma is whether to send the lens to the repair center in Irvin, CA or to New Jersey. Any one with experience good or bad with either center please advise. This is going to cost me so I would like to send it to the center that does the best work, if there is a difference. Thanks.