I had the Note 2, 3, 4, 5, and 7 (as well as an S6 Edge, S6 Edge +, and S7 Edge). I got my oneplus3 in yesterday and spent the night setting it up and playing with it (I work overnight). I was mainly concerned about the screen difference. I love Samsung screens. I have to say though I really don't notice much of a difference. Things are bigger which is definitely annoying, but other than that I'm good. I put Nova Launcher onto the phone. Mainly because I couldn't stand that oneplus3 only lets you do 4 icons across and top to bottom. After about an hour of that craziness I changed it. I really love this phone. My battery life so far has been amazing. (I'll add a pic). It is also a very fast phone. Even while downloading all 140 apps it never slowed which is really nice. The auto brightness is the worst though. You can't max out the brightness manually unless you turn off auto. Really weird