Well, technically it was purchased for me as a gift... but I received the new Ultegra RD-RX800 clutch rear derailleur. It feels noticeably more precise than the 105 5800 derailleur it replaced, especially with the clutch disengaged. I love the low profile Shadow design and the clutch works as advertised. It doesn't seem to increase shifting effort appreciably either. It just seems to make shifts a touch slower. That's a small price to pay for superior chain control on rough surfaces.
