It charges quickly(ish) to 4 bars, though. Regarding sizing, I wear a US 5, or a UK 3, or an EU 35 and my feet measure 22. These are NOT DREAM pants, but OR SUPREME- they are completely different- just look at my picture. The foot bed isn?t soft and cushioned, also not too flexible, but the right amount to walk comfortably in. Theyre pulled firmly into position and I dont have to wiggle them around to get the pins to connect. Probably the worse thing about them is the charging : I leave them in the charging case overnight and when I put them in in the morning, often times as least one of them will tell me "battery low" within two minutes of use (after theyve been charging all night! I will write a review in a few months about how well they hold up. Im a Birkenstock fan and almost ordered similar Birkenstock sandals. The volume is great from both the speaker and mic, and he has used it for schooling a few times, among other things. I PLAY PANDORA IN THE BACK GROUD AND CAN CLIENT CAN NOT HEAR AT OTHER END OF PHONE.