Mated this SRAM PG-1070 10-Speed Cassette and SRAM PC-1071 10-Speed Chain with my 4 year old Shimano series 6600 drive train (SG-X 53B and 39-B, RD-6600, FD-6600, Ultergra shifters) with no issues what so ever Easy adjustment, clean shifting, more even and better steps between gear shifts. I replaced a Shimano SG-6600 1225 cassette with the SRAM 1128. This gave me notably faster flat speed and easier pedaling on the hills.
This cassette is amazing. I get over 20,000 miles...yes that's right over 20,000 miles on each cassette. No skips, ands or buts! In case your wondering ... for me that means around a year of pedaling. BTW the cassette cleans up real nice and will always look brand spanking new.