I'll be keeping my 5S until a new 4" is introduced (hoping). I'm was out of contract when the 6 came out and tried it for a week or so but the size did not work for me personally once even a minimal case was put on. I have one arm so one-handed usability is key for me. The 6 is just a little too big in my hand for stable one-handed use. I do have a 6 as my work phone used for iOS testing/troubleshooting that just gets used primarily at my desk, so I get opportunity to try and make it work, just doesn't for me.