I am a big Mavic fan. I have a set of Ksyrium SL that are 10 years old and still going strong and true. I also have a set of Crossmax SLR's for my mountain bike. Anyway I was looking for a new bombproof set of wheels that had excellent braking. The Cosmic Carbone SLE really peaked my interest with the black Exalith braking surface. Initially the braking surface squeals horribly and embarassingly. I bought the Jagwire brakepad toe-in tool to help with with toe in. That made all the difference. Braking is so much better than standard aluminum rims and I suspect much better than a carbon braking surface. Some downsides. The spoke nipples are internal, water can get inside the carbon faring and can be difficult to get out. The design and aerodynamics are not the most modern, but are still good. Durability I suspect like most things mavic will be amazing. And they look really good, yes vanity played a big part in the decision to go with the SLE. The weight is also fairly competitive when compared to other carbon clincher wheelsets. I am happy with the purchase and would recommend this to someone looking for a true all purpose wheelset.