I called 3 stores and found one that had a demo. I walked over there so fast I thought I was going to pull a hami... Coming from the Note 2, the Nexus didn't feel big at all. Barely wider, maybe a half inch taller, and thinner. I have big hands, and handle my note 2 one handed all the time, and the Nexus was no problem for me.
What I liked: felt thin and light. Screen is huge. Camera with HDR+ off is very fast to open from home screen, and to take pictures. After taking a shot, you can pull the pic over instantly and look at it. The Note 4 has a 2-3 second delay when you go to the gallery to look at the pic. With HDR on, the Nexus has about a one second pause after taking it, and another 2-3 seconds to look at it the first time for processing. Note 4 is faster with HDR on. Indoor picture quality was definitely better on the Note. Better lighting, better color, and more detail.
The screen is definitely better on the Note 4. It looks brighter, sharper, and more vibrant. Also, as fast as the Nexus was doing everything, the one time is was REALLY slow is when I opened the gallery from the home screen after I had taken like 20 pictures. It took at least 5 seconds to show the thumb nails in the little boxes of all the pics. I couldn't believe the lag. Once it loaded all the pics, it was fast again. Hopefully a soft ware bug Google will fix.
I ordered a nexus for myself and my son, but now I'm torn. The lags in touchwiz are more consistent, but small, and the rest is so good. I just wanted a change from the Note series after 2 years....