They definitely did what I needed them to do! They sent me used equipment and forgot a support bar and then between 6 plus they sent me a piece and of coarse it was the wrong piece so then they gave me a full refund which was nice but I wanted the product so very DISAPPOINTING. Absolutely love Rainbow sandals. For the price it’s perfect. Wirklich toller Schuh, mit sehr guter Qualität und hohem Tragekomfort. All very cool. These things are freaking excellent! I chose Medium ( I am size 34) but pants were really a 32. They work great, sound is really clear and loud. I am not being overly critical I am merely saying the M-100 have a place in fun music listening or if you are DJ, but not the best for detailed, critical listening.