I've been on statins, Simvasatin 20mg, for several years with no problems at all. My cholesterol went from 6.6 to 3.2 in a matter of a few months after starting. A friends of ours had some problems before they found the right brand of tablet for her.
I recently started taking Q10 as various reports suggest it's a good supplement for statin users. I can't say I've noticed any difference but would appreciate professional comment from one of the medics on here.