Just right for the bare necessities
Use it to carry Epi-Pens, cell phone, keys, IDs/cards, small hand sanitizer, chapstick. Not too small, not too big. Just right for taking my kid to the playground. I like the unobtrusive shape; it hugs the body. Seems very well made, but haven't had them for very long. Have two now.

it is great
I use it to carry small things that I must have when I run like an epi pen, ipod, and my car keys. I still have plenty of room. It is comfortable.

Too small
This lumbar pack is made of a heavy nylon material, which is great for durability but makes it feel heavy and stiff. This product will not hold much more than some keys and maybe a wallet. I was expecting a little more room. Since it is nylon it doesn't stretch at all. My JanSport lumbar pack is much lighter and can hold much more. Also, the strap holders for the waistband are very very flimsy and cheap. I was expecting more from TNF. Overall, this pack is good for carrying keys and change if you were going on a walk, bike ride, etc. but would you really want to carry a waist pack for such little items that could be stored in 1 pant pocket.