Just received mine yesterday, 4 days ahead of the estimated delivery date.  It's a beautiful phone.  I updated to Lollipop last night.  I will be giving it a test drive over the next few days.  I'm on the AT&T network, and the Pure Edition is working well.  I get 4G LTE.  It's very responsive.  I like the display a lot.  I prefer it over my previous N5.  I like AMOLED screens over LCD's.
It took some a little work to get Smart Lock working.  I had to uninstall the Google Play Services updates, and sideload 6.5 to get it working.  I like Active Notifications, but I prefer Glance on my Windows Phone.  The response of the phone is very good (no lag).
I wish there was an IR blaster, user replaceable battery, wireless charging, and shock/water resistance.  That would make it near perfect.
I will test out the camera in the next few days as well as condition the battery.