In less than a week. I got them as a temporary solution until I could afford a new set of clipless pedals. Unfortunately, the temporary solution lasted approximately 6 days. The actual strap itself seems to be a very good design. However, the set screw in the front got all messed up. I noticed that left strap had gotten a bit loose. I went to tighten it, I found that the set screw had bent. When I went to unscrew it it promptly stripped the threads in the housing.
Needless to say, I am not happy about this.