Has played the C-1 for about a year and a half and enjoys it: controllable and linear, with good spin for little effort. It is not very fast, so they supply the speed themselves, which suits them because they value backhand control over the quality of single shots.
“I've been playing C1 for about 1.5 yrs now and I quite enjoy it. Controllable and linear but generates good spin without too much effort. Not a terribly fast rubber, you'll have to provide the speed yourself”