The audio sounds crisp and clean and I get compliments on my microphone quality. They are absolutely slip proof, easy to clean, and true to size. I purchased a Blue Yeti X and needed a longer cable to go with. The base and pole also came with several scuffs and blemishes. (I included a link below) The bolts slide easily in the track. The same for the XM8500, which sounds much worse, but better than the D2. My original review:Worn for some of everyday since purchase, mostly around the house and garden, occasional dog walks (with socks) and frequent, probably daily cycling trips. Know which ones I’d prefer and in some cases stock up on certain slippers because I love them so much. Very comfortable but cant feel much heat as expected. I have been wearing Birkenstock’s for 15 years and do not wear ani other shoe as I have serious neuropathy that prohibits any other shoe.