No, never had any problem though I know they had a reputation for failing.
After trying it out fully stiff / fully slack I ran it on the slack side of 45 degrees (if this makes sense) probably about 35/40 degrees, so it might not have been working as hard as yours. Kept the rear ARB in the middle hole, and this combination, together with higher than recomended camber and middle compound Kumho's worked well for me. Sold the car a couple of years ago so I don't know if it is still OK. Came across the CC green one in the garage and thought it might be useful to someone.