A neatly made seatpost; reasonable weight (my 31.6x330mm weighs 260g rather than the 215g shown); well designed clamp which accepts 7x7, 7x9, or 7x10 rails; useful height markings; and a clever silicone collar which helps keep moisture out of the frame.
Downgraded it to 4 stars because of a couple of problems:
(1) The concept of using the thumbscrew to set saddle angle and then locking with the rear screw sounds great. Unfortunately, the angle drifts as you tighten the rear screw. So if you want say 3 deg nose down, you quickly learn that you must begin between 5 and 6 deg nose down to arrive at 3 when the rear screw is torqued.
(2) The head of the rear screw isn't deep or strong enough to handle all the tightening and loosening resulting from (1). Plus the torque spec of 8nM is probably too high for that screw. I carefully greased the threads of both screws before starting, but eventually rounded the Torx T25 head of the rear screw. Fortunately a 4mm hex locked neatly into the stripped T25 hole, enabling me to extract the screw. And I happened to have a damaged Cyrano 00 carbon seat tube, so I used the titanium(!) rear screw from that in the R3. That titanium screw has a much beefier head than the steel (?) one that came in the R3; that same design made in steel would probably avoid the issue in the R3. The torque spec for the Cyrano 00 clamp is 7nM rather than 8nM. I'm starting out at 6nM in my hybrid setup, will see if that works OK. If I were doing it again with the R3's current hardware I'd set the torque wrench at 6nM and be very careful to ensure full engagement of the Torx bit while tightening.
Of course, another option is to avoid all this and just get a Thomson Elite: a little lighter, a little cheaper, great angle adjustment. Alas they were out of stock when I needed this one!
Light and smooth riding post. Design and lettering are beautiful. Goes great with my Fizik saddle. Getting level at initial installment was tricky but once leveled it is a breeze.