My Experience from another thread:
After a weekend with my 6+ I must say I LOVE IT! I really like the double tap feature and can use just about any feature one handed because of it. I'm 6'2" with pretty big hands and I love how it feels. Handed it to a guy in the store yeaterday and he said, "Wow it's big. How do you like it?" He was a big guy and I told him it was really nice if he wants the best "phablet" on the market. He was coming from a 4s and the 6 looked big to him, too. I played with the six for quite a while and it felt relatively small after holding the 6+ for two days. After doing that I don't regret my decision at all. I still think 5.1-5.2" might be the sweet spot for me, but without that available the 5.5" is the choice I'm good with. Phone works great so far. Calls sound great, iOS 8 seems to work fantastically, browses great, and the regular web sites look good (after a simple pull down on the web page to load them...thanks iOS8) on this size phone. I really don't like most websites "mobile views" so its nice the 6+ does such a good job showing the standard view.