Crocs arent exactly the height of fashion, but Ive always found them to be very comfortable, and the Bogota more closely resembles a normal shoe than do many other Crocs. ? Still AA batteries for the controllers. However the real clutch is the W-King Support, I had a complaint about how the speaker would beep indicating low battery once it got to about 20% , but then it would keep beeping way way way too much (like 5 times per song), and they contacted me and helped me upgrade it via new software they created specifically for this issue, so now it only beeps at 20% 10% and 0% battery life. I have used a similar item in my other house, but these are SO SMALL you can barely get 3 2x4 under the top shelf bracket. Glad I purchased ! They have been my daily drivers for the past 5+ months. Works great and very cute and reasonably priced gift. Because of this I have dropped it to 4 stars. I have tried all kinds of brands but Birkenstock is the one for me and especially the ones like this with the back straps and double adjustability with the ankle strap as well as the toe strap. Maybe I just got a bad pair??.