It just arrived today. Dell are weird and never even told me it had shipped.
It looks smaller than 27" because there's very little bezel, compared to my very thick bezel 28" it has replaced.
First time using 165Hz and wow, what a difference compared to 60Hz.
One problem - it's not officially GSync, its 'GSync Compatible' aka AMD FreeSync with a NVidia stamp. I tried World of Tanks and was getting intermittent black screens for 2-4 seconds every ~10 seconds. Found others reporting similar problems in other games and its a problem with GSync. Disabling that in Nvidia control panel solved my problem entirely and I don't notice any difference in smoothness ingame, 165Hz is still buttery smooth. If GSync is important to you, probably best to go for a full GSync certified monitor - otherwise it's very nice.
Comes with UK and US plugs, HDMI and DisplayPort cables. I've got it mounted onto a VESA double-monitor arm so can't comment on the stand.