Ok quick Oneplus 3T update. Phone is rapid as f***, no issues with having loads of random crap open all the time. Finger print reader is also disgusting, phone unlocks instantly, other features like double press power button for camera etc are very nice. Dash charging has changed the way I charge my phone its probably plugged in for 20 mins each morning and thats it, battery lasts ages lowest I've been thus far is about 20%.
The small UI tweaks they have added are nice, and I've got used to them from the stock android on my old Moto X. I love that in Android n/7 you can reply from notifications, saves so much time.
Overall for £400 its a great phone for a good price, the Pixel might have a better camera but is that worth an extra £200? Only issue for some might be the large size, its bigger than my dads S7, but much thinner. If you need a new Android phone I'd certainly recommend the 3T.