I've purchased a number of in ear monitors in my time, and I've had poor luck with the fit, mostly because I'm so active on stage that the buds, despite an initial tight fit move about and the tone shifts. However, I haven't missed the fact that the sound quality and clarity of these buds in particular are so so good!! While I can't perform with them, I can maintain a tight fit while just listening casually and I really love using them. For performing, I'll stick to a different type of monitoring, but I'd highly recommend them.