I wore these for 40 hours of flight time to see if the new carbon-fiber build actually beats the XM5.
In my real-world testing with ANC turned on and volume at 60%, I consistently hit 48 to 52 hours. If you turn off the noise canceling, you can easily push it past 60 hours.
Yes, the multipoint connection is faster than ever. I can switch from a movie on my iPad to a call on my iPhone in about one second without fumbling through Bluetooth menus.