Aperture priority doesn't work and to reset AEL, you have to put it to bulb mode. This never bothered me since I don't use aperture priority. I would sometimes use AEL for certain situations.
All shutter speeds are accurate. Working light meter. Installed new mirror foam and light seals (except on camera bodies door channel). I've had no issue with light leaks. It feels a lot better to use than the FM2. The tactile shutter speed dial and buttery smooth advance lever makes it such a joy to use.