It's such a personal thing, whether an eyepiece or viewfinder works for a glasses wearer, that I think you have made the key point, Kevin: once you get something that works, you stick with it and don't bother with other finders. I tried the Voigtlander plastic 35mm finder (the one with rounded edges). The view was OK but the whole optical unit is a slight negative lens. My eyes have almost no accommodation these days and I found I had to use a +1 dioptre correction lens to be able to see clearly. I could not see how to attach the correction lens so that was the end of that. I then tried the Leica finder and found I could see clearly. In terms of field of view both finders were about the same (I also sometimes have to a little side-to-side movement) but only the Leica finder was useable by me...and once I got a finder that worked I haven't bothered to look elsewhere.