An excellent in ear monitor. I use it for only my own vocal monitor. I can hear everyone else's from the onstage sound. It is absolutely perfect for this application and at last I can hear my own vocals in the monitor. I have my own headphone buds that I use, and I only use one bud, as I like to use the other ear for the onstage sound. Regarding quality of the feed, I don't know what other folks are going on about. I can hear myself, I'm not even mildly concerned in the sound quality. I need to hear myself so that I can sing in tune. With the rest of the band hammering away, I don't think I would be able to tell the difference between the highest quality hifi and the lowest quality. The sound quality is certainly good enough for me.
My only issue is with the belt pack. I wear a suit onstage and using a belt clip isn't suitable. If I could get a strong clip to attach it to my guitar strap, that would be perfect. I can feel a duct tape experience coming on.
Great product for me.