I had major elbow surgery 6 weeks ago, so since then Ive been having to use my iPhone 5s one handed and got by rather well. Just got my iPhone 6 and finding it much harder to use than I thought it would be one handed. The double tap helps some, but still seems rather inconvenient. Maybe I'll get more used to that option. Ive noticed that many of my most used apps/icons are on the top of the screen. One option that I think would be rather helpful is to be able to organize icons bottom to top rather than top to bottom. That would have cut out the need for the double tap option in many cases.