Glad pretty much everyone seems to be enjoying their 8/8+ so far.
My initial thoughts after 24 hours.
Pros: The A11 chip is leaps and bounds above the A10 Fusion chip, the glass back feels much nicer than the aluminium of the 6 Plus>7 Plus, despite being the same screen as my outgoing 7 Plus it's much brighter (True Tone seems to suit iPhone better than iPad?), the iSight camera produces much better results and the stereo speakers are much louder.
Cons: The stage light effect in Portrait Mode (appreciate it's in Beta) produces some poor results and feels more like a gimmick at present, iOS 11 feels like it needs a .1 update in the next couple of weeks to refine performance, screen is the same as 6 Plus>7 Plus in terms of HD and PPI (was hoping Apple might've encroached on QHD/a higher density display).