I have these and love them, got them for around $50 on a Nashbar sale day. I never installed the cleats for click pedals, just left the plate in place and wear them like regular shoes with platform pedals. Comfortable enough to walk around off the bike, but a stiffer front sole that doesn't develop hotspots as easily as flimsier soles:
Rumble by Giro - High Performance Trail & Mountain Bike Shoes
Before that, I used a pair of gumsole indoor soccer shoes, they worked well for shorter rides, but anything over 25 miles or so started to develop pressure points.