We've been using some of ours for over a year now, they're fleece and terry, nothing fancy, just the 'value' ones from Babykind. We tend to use the soft fleecey side most of the time, and only the terry side if anything gets stuck on DDs botty!
Some of the stitching is starting to come undone on a couple of them, but nothing that is really causing a problem at the moment... I could actually stitch them back together, I just haven't bothered. I imagine we still have another year or so's use out of them.