I just bought a Pixel 128GB black from Project Fi, and have been using it now for 1 week (to the day).
I'm returning it.
Coming from an S7, there's trade-off's, and to be honest this phone isn't (to me) worth the (still incredibly higher) price tag of ~$700. Yes, the Pixel has like zero lag compared to the S7, but there's so many little bells/whistles in the S7 that I've come to rely on (cropping a screen shot, for example) that are native to the phone.
I'm initiating the return process tomorrow and going back to my S7 for now until I see what the Pixel 2 looks like, and maybe the Note8.