Maybe I'm a luddite, but I'm not a huge fan...You have to wear special shoes, it's just as easy to get in and out of clips, you don't hear stories of toe clips getting stuck, because of grit or dirt, and (IMO), depending on the type, they don't look correct on classic steel.
Mainly, my first reason is my main reason against clipless pedals (and bike kit clothing, and saddles requiring a chamois, etc) - if I own a bike, I want to be able to go to the garage and hop on. I don't want to have to put on special shoes, swap out my underwear, and don a special shirt. What's the point? To that end, Brooks and toe clips all the way, for me....