Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
It wasn't that bad for me and I have really small hands. I can use the 6 one-handed okay, but it is slightly too big for me to reach all the way across the screen with my thumb. I actually don't use reachability at all, the biggest issue for me is the width of the phone not the length as most of my one-handed use is web-browsing where all the controls are at the top of the page. I've noticed that I shift my grip instinctively when I'm moving my thumb across the screen, but it took a little while before it felt natural to do so. I do feel a slightly smaller phone would feel more natural, but I don't think I could go back to the screen size of the 5.
 
I have a 6, 4.7 inch.......and brought out my old iphone 4 for my son to play with. Couldn't believe how small it was and I could never go back.

I ordered 7+ this time around for the camera but I'm worried it's going to be too big for my pockets.
 
I used the iPhone 6 for two years and just switched "back" to an SE last week. I prefer the smaller size, as it's much easier to get around with one hand, and it fits in my front pants pocket much better. I hope Apple keeps making smaller options in the future.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.