I got my 6 Plus today and I absolutely love it so far, but the one "gotcha" moment that I experienced was when I went to listen to Spotify on my walk to the store. I quickly realized that the Plus is not nearly as good a music player as my 5 was, because I can't quickly whip it out of my pocket and navigate my playlists with one hand.
I still love the device, but I'm giving it a week to see how it holds up in various real world situations. Tomorrow morning, the Plus goes to the gym 🙂
There are so many pluses (pun intended) to the larger screen though, and so far it's a joy to use. Just a matter of weighing the pros and cons.