I just picked up some QC25's this week. Looks like they will be the second headphone I've kept since buying my P7's in November of 2013. The noise cancelling is unreal, and the sound is actually surprisingly good. I also kept the Beats Studio Wireless, which if they had thicker pads would get used more. I feel like all 3 of these have pretty similar sound signatures - from someone who isn't a very analytical listener. I just want something engaging that doesn't sound "off" to me. I've tried probably 6 others that have just not sounded right to my ears. I still favor the P7 from purely listening, but the Beats give me wireless and mediocre noise cancellation without much SQ loss, and the Bose give me crazy noise cancellation without much SQ loss. Very happy with this trio.
They are very impressive NC headphones. I thought the QC15s or QC20s were amazing, but Bose was able to squeeze out even better performance from their noise cancelling circuitry.
In case anyone is interested, I'm thinning the herd a bit and my Momentum On-Ears (blue) are for sale per my sig. below.