I have had a set for just over a year 1 yr 2 months.They have done a lot of miles and been to Cwmcarn Dh for an uplift day,they have also been to Gawton and Tavi and Cann woods so they seem quite indestructible.
Have had no problems with them.Strong and quite light.I weigh 16 stone and ride quite aggressively.I have just changed a couple of bearings in the rear hub.
I strip mine and clean out the freehub and re-lube them every 3/4 months.
Pickup is ok but is not even close to the I9's i had before.
I am trying to find some cash to build up a set of Chris kings with either stans alpine or mavic xm ust rims.