After over a year of use, I can safely say the headphones stand up to the rigours of sport, sweat and other activities. They are lightweight and sound just as good as the wired SE215. I was specifically looking for wireless headphones that weren't bulky in the ear, and Shure solved this successfully. The noise cancellation is adequate, though the "environment mode" with the cancellation off is slightly off-putting, since the microphones are behind the ear they pick up more from the back than the front. Having a discussion with someone while wearing them can be strange and I can't say I've managed to get used to it. This is the only reason the sound rating isn't a 5.
As for quality, no major issues so far, though some hiccups have occasionally occur when trying to charge used or dirty headphones. Just make sure the contacts are wiped, are clean and dry before putting them in the case to charge.
All in all, a great sounding all-round wireless noise cancelling headphone that is comfortable and lightweight. Not sure what the battery is rated to, because I haven't emptied them once, even after a 7 hour hiking trip.