As youd expect from the brand the audio quality is excellent. though the 300s have other issues (extremely sensitive to proper orientation in the ear). Erneuter Kauf? Ausgeschossen! They installation was pretty simple and took about an hour total to install it. Why would I buy another pair from a company that will not stand behind their product? but this slipper got cracked after a month ?? she likes them and always gets complements on the shoes whenever she wears them. But once you have it figured out, you can buy online and get a great fitting shoe. All you need to do is look at there packaging, then the install and then product performance--flawless and as I stated most impressive I will look for Giveet as a preferred supplier. One of the better $25 Ive spent for sure.