I've always thought the Voigtländer Vito II was the perfect travel camera and have used it most in that capacity. The classic little folder is actually more versatile than what that categorization implies, however.
I think the key to shooting the Vito II successfully is, as often the case, a matter of knowing the camera's capacities and your own. There is no question about the resolution the Color Skopar lens can deliver. The camera is easy to carry along because of its compactness. It doesn't have a built-in rangefinder, and I think that is likely what causes many people some hesitation in using the Vito II.
A little practice at distance estimation goes a long way toward building confidence. Choosing shutter speeds and f-stops appropriate to conditions and your own judgment capacties and steadiness is also a matter of easily gained experience. For me, shooting the Vito II at f8 and 1/60 is about as wide and slow as I can go and still get well-focused close-up shots without camera movement. Those are the parameters I selected for a recent open shade portrait session. I can get most shots right at those settings at a distance of 3.5 feet. At 6 feet I seldom miss as the depth of focus is much more forgiving.