I'm sure the Pixel C is going to be the best android phone around but as Hippy says, not twice as good as the Nexus 5 was. I realise that's not how pricing works but I really do think £600 takes the piss.
Just bought a 5x from Argos for £175 (with voucher). That'll do me for a year or two.
It was never going to have an SD slot. Google don't do SD slots (on phones, I think my Chromebook Pixel has a full size one).
If the Pixel phone is as good as the Pixel laptop I want one. But when they're cheaper, obviously.