The sound quality is comparable to other basic headphones, and is good for music, audiobooks, and even phone calls. I will definitely keep a case on my headsets from now on. The trainer can cope with different width spindles and bolt-thru. The phone mount is easy to install. I used to be a double pillow person. I wish there was a pump or another delivery method, because I feel like Im wasting product. I also didnt know the VARIETY of cleaning tools it came with and specially sized for the jars. Now, with 3 months and half I decide to made a REAL review, accurate overall:I began with the BOX: Very nice, is small and inside have the earphones (obviously) and 2 extra earbuds with respective two sizes: one smaller and other bigger than the earphones have in the piston. I selected the CozyPhones b/c they had a 100% satisfaction guarantee and I just couldnt afford to spend another $60+ on headphones for 3 kids just to have them rejected/fail. To try to get them fit more securely, I pulled the strap as far as I could while still attaching the velcro but then the strap stuck out in a weird way on the side of my foot.