I had the same problems as those in the reviews with the rear hub. After about three months of using it the rear started slipping, up to half a crank rotation, which on one occasion caused me to chuck myself forward off the bike and resulted in some serious ball pain! Was told very bluntly that this had been caused by me using WD40 on my rear cassette. I didn't use it as lube, just a quick spray to stop my cassette rusting up, as bike lives in the shed. Part of me thought fair point, but since I had treated every other bike I had owned like this and never had any problems it still struck me a bit odd that this hub would be so troubled by this. Even when I stopped using WD on it, I was still having to crack the hub every 2 months to service it. It was a pain and I had no faith in the wheel, as it was always mid ride it would start slipping. Needless to say I don't use the wheels any longer, and the customer service put me off the company.