The best feature of this product is that all the USBs plug into the unit, then the AC cord gets plugged into an outlet. Every toe has been broken at some point during his career, none point in any really healthy direction, and two are constantly complaining regardless of the quality of boot or shoe he buys. My right ear bud didnt work when I received them. Sadly I?ll have to return them. I?m old enough that I know my feet have stopped growing. They fit well and I like the fabric. What else is there to say? they are good looking and although stiff now I know will soften up. After about a week of wear, these slippers are definitely "broken in". They sound muddy, they lack clarity, they overall just sound bad. I order size 8 (US) the euro size listed is 39 for my mom, who wear US size 8 EU size 38 which she says runs a little large on the toe, she likes tighter shoesI wear us size 7.