I've read about them but never tried them. I'm curious about how long they last. It seems like people say they die kinda fast. And go dead and clanky. Is this true? Do they need to be changed soon for a flat? Do they last for years with no problems? What is the lifespan? I was thinking about these strings. Or maybe Labella. I love gauge 45 - 105. Rotosound flats seem to have been used by some pretty rocking bands. I play rock.