I know this topic has been discussed many times in the past. I really wanted to give an iPhone a try coming from an Android, but the navigation on the phone seems to be a huge downgrade.
The back button is in most applications out of reach with one hand. And swiping on the right edge is not user friendly for a right hander.
On android you can do that from both sides and it makes the overall experience much smoother!
Will apple ever catch up with android?
I actually just switched from Apple to Android. I switched to the gestures control scheme, but personally I found that I liked it less than the gestures experience on iPhone and went back to the classic button control scheme.