I'd say the "normal shoes" thing is the bigger consideration when commuting in a city -- frequent clipping and unclipping just isn't that big a deal when you've had a little practice. I wear SixSixOne mtb shoes with recessed cleats -- they're fine to walk in, although I wouldn't want to walk for miles and miles in them. If I'm ever going anywhere where I will want to lock up the bike and walk some distance, I will throw a pair of Tevas in the pack. Looooove my clipless...