I cannot speak for the Olympus, but I can for the Rollei. I bought mine in the early 80's and it has been used extensively. The photos it takes are wonderful. I traveled for a living and shot mostly slides with it, and on the screen they just popped. I have not seen another camera that could do much better than the Rollei at any price. Mine also has the 2.8 Sonnar lens. Over the years I have had to clean the timing gears in it from time to time. It is easy to take off the top and clean the mechanism. You can tell when they need this when the slow speeds start to stick, start over, stick again. Other than that, nothing else has failed. As far as the lever goes, I would just leave it alone unless it is rubbing the camera.