Quote Originally Posted by stradibarrius View Post
I was really just interested in the mechanical dependability of the winder. How it feels is an individual thing. It is all about what feels normal to you. I have an RB67 as well and the left hand grip for that camera feels better to me than the left hand grip for the M645???
I purchased the motor winder for my 645 used some years ago. It has been very reliable but kind of loud. It takes a bunch of AA cells and replaces the manual winder. It's good when mated with one of the metering prisms and allows a faster shooting experience. I have no complaints.