The belt holds up well when I'm wearing the right leggings. It's pretty comfortable considering I have bony hips. My phone only fits in the side pockets with no zippers, so I rotate the strap 90 degrees when I use it. No problem.
Pros
It is ideal for long runs, hikes, bike rides and other sports activities.
Cons
The Nathan Zipster running belt may not be stylish or aesthetic.