Originally posted by chickentender I agree with this in part but I think it greatly depends on what you're shooting. The only time I really find the WLF useful (and extremely in this case) is street shooting when I'm using hyperfocal (or close to it) and can be generally/moderately sure about my focus. It's very useful for framing and shooting in a more discreet manner, but for critical focus with a shallow depth of field (especially in lowlight) it's a PITA.
Yes, street photography (in the widest sense) is when I tend to find wlfs most useful too. And anything with low point of view, of course. A reasonably fast lens with a proper distance scale, and a decent split-image screen tend to help of course, but as you say, in low light...
So that's what made me curious about this FC-1 thing, and the fact that it seems a very quick way to change from near-WLF handling to eye-point. This is maybe one of my biggest frustrations personally, when using a wlf: those moments when you feel that for this one shot, you'd really need to be at eye-level!