When I test rode my Tetra Pro I went back to the bike shop to tell them the tires needed inflating because the ride was so smooth. They checked and the inflation was 120 psi. If nothing else the bike is comfortable. My last bike was aluminium and there was a huge difference.
I do not feel beat up after a ride. Although not a racer I do ride 40-70 miles on a Saturday with 3-6,000 ft of climbing. The bike descends well also.
I do not know what to compare with, but my 1 1/2 year old Calfee has been an excellent choice for my aged body. I needed a light frame for the hills but a comfortable ride for the body.