Essex camera in New Jersey did a good job on my Canon 7 about four years ago, it has been flawless ever since. I also had them CLA a Canon VI-T and V-T, also working fine ever since. Viewfinders came back crystal clear on the latter two, were hazed over when they went in. The Canon 7 was jammed, the V-T shutter was erratic, and the VI-T just was due for a cleaning.
http://essexcamera.com/camera_list.php?brand=CANON
I also used KEH for a Leica CL in June, also did a good job. It was completely jammed, working fine and meter is accurate.