For charging, it is rather fast, in 2 hours, it's done. But there is more on the next day, reload them.
To position it's a little headache, I have small ears and I do not find them comfortable. My husband who has the biggest yet, either ... They do not stay in place.
After that, opinions are divided, my husband found them sound pretty decent but not amazing, whereas I find it too steep and I do not hear all the bass.
I tested them with my phone, a Sony Xperia. And also with I phone 5. The result is the same, so I have a very good sound with other headphones.