Received today, so far *touch wood lest something happens!* so brilliant. I'm not disappointed coming from my 6P as I was afraid I might be. Screen is fine, don't see the "omg pentile at 1080p" fuss. Camera is fine, does suck in low light by *default* but HQ mode sorts that or manual 400ISO@1/3s i.e. software issue. Admittedly not taken many shots but that's my experience so far. Speaker is quite good, alright it's not the awesomesauce stereo front firing brilliance from the 6P (what is?) but as bottom firing speakers go I've heard far worse. Those were my main concerns. Meanwhile on the plus side boy does it fly! SO fast.
No, it doesn't have Wifi Calling on EE. If it ever gets it, I'll be one of the first on board.
But yes, it does have VoLTE and yes I've tried it in a call to 150 and it said "HD" on the call screen and stayed on 4G.
Right now, my relationship with it is positive enough that I've opened the non-returnable-if-opened rear case and pulled the instruction label off the back.
Yes, the touch latency is a thing. No, I don't think I would've noticed it if no one had made a fuss about it. It's not an issue 99% of the time as it only seems to manifest itself when you're dragging things around, and not "really an issue IMO" the other 1% either. Games seem alright still (it's mostly taps and small movements after all), the UI seems snappy as heck still, the only times I've spotted it so far are dragging icons around and panning the map in my game of pastel equines. It feels like a similar effect to inertial scrolling, and I'd have assumed it was by design if there wasn't the fuss.
I do wish the UI was smaller. Hopefully Nougat adds that option.