I've got Shimano PD-A530 multi-purpose SPDs, which are flat on the one side and SPD on the other, like a lot of other people said. And then that together with Specialized Tahoe mountain bike shoes and cleats - very comfortable. I used the one pair of shoes for over 20,000 km of touring and my feet were never uncomfortable, and after a little 1500 km tour last summer they finally fell apart. So I just replaced them this week with another pair of new Tahoes. You can wear them around the grocery store and campground and not slip around or clink around like so many other shoes do, and your feet don't get sore after a few hours. At least, that's been my experience. I'd highly recommend them.