This is just what I needed.  I have a nice hiking trail near me that I should take advantage more often, but when I do get down there I always have issues with carrying my car keys, wallet and phone.  I used to strap my phone to my arm, but it always slid off and I'd have to readjust every now and then.  That gets pretty annoying when you're in the "zone".  So I needed a bag of some sort that wasn't troublesome.  I loath the idea of a traditional fanny pack, and a crossbody purse gets in the way.
So that's where this bag comes in.  This is what I needed.  It's surprisingly larger than I expected.  You can fit an iPad mini!  The quality of the canvas it's made from is sturdy, and although the zipper was a bit off, I was able to realign it.  My favorite thing about this bag is all the little compartments that allows me to separate my keys, wallet, phone, water bottle and even sweat towel.  It doesn't interfere with my hikes the way a crossbody bag did.  It doesn't affect my balance when I hike as it is kept closely to my body.
My verdict: if you hike, YOU NEED THIS! If you want to keep your valuables close to you, YOU NEED THIS.  It's hard to get pickpocketed when this is so close to your chest.