I've just received it yesterday, didn't put it on yet, but it looks amazing in person really! the size was perfect.. and came over really quick. Don't know how long will last without any scratches but will keep you updated if so ;)

Update 14-04-2013:
It has been four months now of really gentle wearing I do not do hard work while wearing the ring. however the carbon fiber strip did got scratched on is very small and the other is like 6mm horizontally and its a bit annoying. hence the 4 stars; I love the ring and I was hoping it will last longer, however I guess I'll be ordering more of it by time it's cheap enough to be replaced once a year or so :)