I just jumped back to Android after being on Windows Phone for the last two years. I really like Windows phone and it was hard to switch. But the Note 4 will do everything I could on my HTC 8x. Prior to the 8x, I had the Galaxy Nexus.
Gotta admit that coming back to Android from Windows is hard. Personally, I prefer the Windows OS better. But, I can do so much more with the Note 4. The main selling point is the stylus. I have a Surface Pro 3 and I am addicted to using a stylus to take notes in meetings. With the Note 4, I can now take notes a lunch and have them sync with OneNote. I was really glad to see that Android has all the Windows apps I need to make the switch less painful - OneNote, OneDrive, MSOffice, etc.
So far, I really like the Note 4. Now I just gotta get used to Android again and I will be all set. One thing I haven't seen/found yet are the Widgets. On my Nexus, they were located with the Apps. But in Apps, I don't see widgets. I haven't looked too hard yet so I'm sure they're there somewhere.