I'm personally surprised at all the quick responses on AT dismissing these phones, and I'm almost certain it has to do with the price of it.
I've been daily driving both the Nexus 6P and the Pixel XL, and have had none of the experiences of the people trying demo phones or quick touches.
There were notes of the "understated" look of the phone, but the chamfered edges of this phone feel leads better than my 6P. Setting up the phone was painless, but I really wish Android would get up to date on enforcing good backups and restores. I would have loved to reinstall all my apps with data in tact (all my authorization apps and things with accounts). But Android just doesn't do that well. So I had to clean off all my apps, and break / reinstate my authenticator tokens. That's a bit of a pain.
Android on this phone is not Android on the 6P. It's not Android on any Android phone I've ever experienced. The experience is very smooth. I have not experienced any lagged responses, no stutters, or anything like that. Graphics benchmarks lost 5 FPS at 1440P between the first run, and 20 minutes later of steady runs. I experienced very little practical downclocking going on.
The display is absolutely fantastic, the Storage is lightning fast (I imported 50GB of my music from my USB SSD to my phone in 7 minutes). The USB Power Delivery standard charging is even faster than the 6P's.
Speaking of power, the battery life on this is not even in the same league with the 6P. I'm sitting here on my phone that's been used for a day and a half. There's still 35% battery left. This is every bit in the same league with the iPhone, which early reports were indicating.
The camera is fast. The pictures it takes looks great. The Front Facing Camera (for as little as I use it) may be the best one I've ever used, even compared to my coworkers iPhone 7 Plus.
It's a good phone. Just like the 6P, iPhone, and every other phone before it, there's things I wish were different, changed, or slightly tweaked. Honestly, I still kind of wish I got the regular Pixel. I think I underestimate just how much I miss small phones.
But from just a few days with it I can easily determine this. If you are saying that the Pixel is just an overpriced Nexus, you're simply wrong, and I implore you to give it a chance.
The real question is, how is this vs. the iPhone 7 Plus? The hardware is not at parity with the iPhone 7. No water proofing, but a better camera are just 2 points that differentiate the similar priced devices. But for me, and a lot of others, the way the Apple ecosystem works is enough of a reason why the iPhone 7 won't be a consideration, and for me, for that reason, the Pixel XL is a winner.
Android is usually smooth and gets decent battery for the first few days on any new phone. There's no reason to believe 7.1 magically changed this.
In terms of features, particular more sophisticated/cloud ones, Google has more/better than apple, but the basic user experience is significantly worse.