I have my Father's Asahiflex, which is a WL finder with a flip out magnifier. Not fun to use! The image is reversed right to left, and in vertical orientation is also upside down. It is thus not suitable for any sort of action shooting. I have the magnifying finder for my Pentax LX, which is bright and magnified, but still has the problems like the Asahiflex, I think they are inherent to the design. I also have Pentax's equivalent to the Canon speedfinder mentioned above, a nice unit. For the proper WL experience, I'd agree with the post advocating for a 6 x 6 machine, like a YashicaMat or a Bronica.