Not yet, much to the annoyance of my wife. But I've only been using them for a little more than a year. Which is partly because she talked me into getting them in the first place, but has yet to put hers on her bike. I do, however, leave the pedals on a fairly loose setting to make it easy. The only time I had a problem was once when the cleats came loose on a shoe, and I couldn't get it unclipped. I actually had to take my foot out of the shoe to get off the bike. Now I make sure the cleat is securely fastened.