I have the Olympus ME-1 eyecup, and I like it. I don't have many glare issues (not more than I had with the native eyecup) and it does a fine job. I think it's protrusiveness pushes it beneath a person's brow so it doesn't need a rubber hood. The eye-relief is very short - to see the whole viewfinder you will have to be very close to the camera, but that is a fact of life with any of the magnified eyecups. It lives on my E510 permanently.