I moved to the SpiBelt.
However, the Wahoo case will fit the iPhone 6 naked (although quite tight). I had been using it for my 5S before I got my 6.
I just got tired of wearing my phone on my arm. I still have the armband for when I may want to use it.
The belt is hidden under my shirt when I am running or working out. There is no bounce when I am running, nor do I feel anything around my waist when I run. I usually have compression shorts under my gym shorts, so the belts tension is already around my waist with the compression shorts.
Not sure if I expressed that clear enough.