Being in the industry for over 25 years, I have used a few range of IEMs. The IE500 Pro, are by far the best set of in-ears I have ever come across with. They fit very comfortably in the ear and show to be of high quality built. The driver response provides a very neutral, balanced sound resolution at low and high levels. I have used them for long periods and throughout it was always very comfortable listening experience. Listening to the IE500 Pro, feels like you are in a studio on a treated acoustic environment listening to a nice pair of loudspeakers as oppose to a standard pair of in-ears. Highly recommended. BEST USES: Live Audio, Studio and Home! BOTTOM LINE: I would recommend this to a friend.