After riding a custom steel framed bike for years,I decided to take the plunge and go with Carbon Fiber...I had heard they were very stiff,,and comfort on longer rides would suffer.Being more of an endurance rider,I was hesitant...til I heard about the TCR Advanced SL...wow,what a ride!This frame is beefy in all the right places(headtube and bottom bracket),allowing razor sharp cornering,virtually no flexing when climbing,and nimble descending.You launch like a rocket with no power lost.Oh,the ride quality?...after a century ride,I felt like I had done a ride around the block,fresh and ready for more!This bike does it all!