Best bike I’ve owned, super light, handles really well, fantastic on the flat and climbs really well. I’ve found it comfortable to ride. I’m not the lightest rider but have found I can maintain higher average speeds over longer distances on the Ostro. Received a few comments from my regular riding mates that I seem to be riding with less effort, especially when passing them in climbs ! Used it recently in a Standard Distance Triathalon in preference to my TT bike, pleased with overall performance. My Ostro has Ultegra Di2 compliments the bike really well.