I really like them. I'm a bit of a headphone whore and have tried/owned a lot. The B&W P7 was amazing and I've been trying to find something thats wireless with ANC that is as good and its been tough.

I've had the Bose QC35II, B&W PX, and currently own the B&O H9i. I've never tried the Sony XM3s as I just like a more premium build quality but they are supposed to be very good.

I think I'm going to keep the PX7s and sell the H9i.