~ very comfortable to wear -for the kids, too
~ easy to adjust the straps between wearers
~ easy to fill and empty
~ easy to drink from - bite valve that doesn't flood your mouth or make you suck a watermelon through a straw
Hank wore it to a day long scout event
Ella wore it on a fun run
It's perfect for dayhikes with the kids because I have enough water for all 4 of us and my hands are free to take pictures.
I have taken it on a couple of runs and neither the weight of the pack nor the swishing of the water bothered me. I've also used it on some of my longer rides (before I stole both Bill and Jake's bottle cages) and again, it performed perfectly, and its presence was hardly noticed.
In a nutshell, I love my Avila and use it quite often even though I'm not cranking out any major miles lately. If you're looking for a hydration pack, definitely check out Hydrapak.