I have a 1st gen prism finder that looks cool (huge, heavy) but I seldom use it. I like the reverse perspective that the prism finder negates - maybe the difference from 35mm SLRs and rangefinders helps me keep the two separate. Mine (RB) came with the chimney finder which I like. No floding WLF. Somewhere someone mentioned winter shooting and how to keep the snow out of the WLF - something I hadn't considered since it isn't a problem with the 'sealed' chimney finder.