I haven't taken my doors off, though it is the plan to do Bryan's alignment procedure to get them fitting properly finally. So far I've had no problems with them at all (installed originally in 1998). A little bit of moly grease would be a good idea - I don't remember if I had thought about that when I installed the doors originally. I don't think it's an issue anyway since the doors are light and wear surface is kind of large (small width round the 1/2" hole in the bobbin).
I did have kind of a funny experience with them though. When I put the "pin" up to the bobbin, it was too big to fit! I thought what the hell is that?! I called Richard about it and he said he sized them with the expectation that the bobbin would be worn (which makes sense since it would be much worse if the pin was too small than too big!). My car had only 10,000 miles on it so I guess they hadn't worn as much as Richard expected. I had to have them turned down a little to fit.