Top critical review
I was always satisfied. But over the time quality has continuously decreased ...
on 18 June 2017
Having bought these coil heads for quite a while now, I was always satisfied. But over the time quality has continuously decreased and now reached a level, which has become unacceptable. Instead of a couple of days, they just last a couple of hours only. Even when just replaced, they are not good now. This product cannot be recommended any longer.