I have 3 of these headset in 3 different bikes. Like all ritchey products, very smooth and well built. Compared to a FSA headset bearing, I feel they are much nicer because of all metal construction while FSA use half metal and plastic and feel cheap inside. The ritchey bearing are life time warranty which was a stronge selling point.Very easy to install on and to remove.
Overall, I am pretty happy with the feel of this headset. Installation was as easy as any headset is, which means it was not easy, but thanks to some MacGyver like ingenuity I created a home-made headset press that worked remarkably well.
Obviously, it's hard to speak about the longevity of the headset since it is still pretty new, but I have high hopes for it.