Picked up an6 and 6+ on Launch day. Had preordered the 6 and while standing in line they said they had the + and said what the hell. I have been using both and kept finding myself going back to the plus. It was an adjustment from the (s but being 6'4" I have big hands and I am able to put it in my front pocket without issue. Really enjoy the screen and after dedicating a few days to using only the plus I can do pretty much anything with one hand.
My only problem, more ocd than anything, was the color. Picked up the space grey at launch since the 4s all my phones had been white/silver. With the 6 and 6+ I decided I would go SG. Fingerprints drove me crazy and exchanged for silver. Could not be happier.
Like mentioned so many times before on these threads, the + is a big phone especially if all you have used over the past few years has been an iPhone. Me included. I have had every edition since the original. Honestly, if you give it a few days and have the mits the + will feel just as comfortable as your old iPhone.