I have WS-50's, and other than the quick wear, they have awesome, linear grip. When they slide, they don't "let go," they still have a lot of grip even when sliding.
Rears - 2 seasons TOPS (lots of parking lot drifting is the main reason)
Fronts- 3 seasons (maybe 4)
S52|ZF|TRM Coilovers 670/895|Staggered 18" 5's