my experiences:
+ Large earcups
+ Comfortable feeling, so it can be worn all day without problems
+ If it really creates the 15 said hours I do not know yet, but gamble a whole day passes (9-11h)
+ Beautiful sound reproduction
Top + microphone, you will be very well understood
- The charging cable is a bit short, but you can live with
Otherwise, it's really a great headset and can only be recommended