The R4M is a pleasure to work with...
For a 35mm lens you enjoy a lot of out of the frame view, and that's great IMO, even more for street, where things quickly moving can be seen on time, before they unexpectedly come into frame just when we hit the shutter... Apart from the 35mm framelines, for that focal length, in the outer space you see the 21mm framelines too, and they help a lot, aligned with out of frame scene's verticals, when they're there only and you can't use the 35mm framelines, for precise leveling of the camera (handheld) to control perspective distortion.
It's one of the greatest cameras I've used... A whole world for wide shooting, and nothing else comes close to it... I even use my 15mm with the whole window, a la SLR...
I use other Bessas too, but I think the R4M is a camera everybody should have or at least try... Its meter is really trustable, more sensitive in the center of the frame and its bottom, to avoid being fooled by overcast sky, and I use its 1/2000th constantly. The camera feels very solid and well built.
Cheers,
Juan