I run CBs – at the Bristol Bike Jumble I can usually pick up endless pairs of OEM Candys and Acids with new cleats for next to nothing. Which is a good thing because the cleats are made of cheese and so are the bearings. I’ve not had any spectacular failures though but that’s normally because I’ve picked up yet another pair and replace them as soon as they get a bit crappy.
I’m going back to Shimano though as the one thing that bugs me is not being able to swap bikes with your mates who are all on Shimanos!
I think if CB could sort the cleat life and reliability, they would actually be the best system – they’re less direct in their initial clip in and out but when you’re in they feel the most fluid and natural in terms of float.