My B&W PI7 got to me today. They do sound good, not quite my perfect cup of tea tonality-wise, but I wasn't expecting that. I got mostly what I was expecting to hear. A rather smooth sound with a slight emphasis on bass. I kind of hear a slight V-shape with the way the treble is pushed a little above the midrange as well. Overall, the bass is on the slower side with a tad bit of boom and impact to it while being far from tight. It's not overpowering and actually has great presence but doesn't quite have the detail/texturing I want. The midrange is on the smoother side and kind of takes a slight rear seat. The upper midrange is a little tamed down but not overdone as to remove midrange clarity and vocal presence/volume entirely. I do hear some sibilance in the vocals. The treble is very sparkly and edgy, but again not overwhelming. Like with the vocals I do hear a bit of sibilance.
Bowers & Wilkins has always been kind of hit (P5, P7*, P7W) or miss (P3*, P5 II*, PX, C5*) with the ones I've heard from them in the past (I should note that the ones denoted with a * were review samples I received from B&W about a decade ago so there might be some possible bias with that). I would say that the PI7 are more of a hit than they are a miss when it comes to sound.
Controls are nice and responsive which is good since I've always found touch controls to either be good or horridly implemented. The controls do lack customization which is a little unfortunate (at least I didn't see any options in the app). I would like to be able to switch between ANC and transparency modes, but that doesn't really seem to be an option. The ANC also does have a tendency to hiss when nothing is playing. It's not obnoxious, but definitely audible. The transparency mode isn't the best, but it seems usable.