5' 10", 18.5" torso, 40" chest. S/M
I originally bought this as a small pack for trail running, hiking/travelling, and maybe a little mountain biking down the road, and would be primarily carrying a hydration bladder and a little extra gear (snacks, shell, dog leash, etc).
When it first arrived, I thought I was set. The size seemed perfect for what I wanted. I really liked the pockets on the hip-belt because they were large enough for my small camera, but not overly big to get in the way while running. The fit is outstanding, and once I got it set-up, it almost disappeared on my back. I loaded up some heavy stuff, and ran around the house a bit, and didn't notice any weird shifting, which is good.
Once you add a hydration bladder, it's fairly expensive. I picked up a 1.5L Hydraulics LT, which brought the total to $132. The little stretch pocket on the shoulder strap is about the size of a granola bar, so I'm not really sure what you'd put in there. I feel you'd be better off leaving that out.
The integration with the hydration bladder is terrible. The external sleeve sits between the back panel and main compartment, and is only 8" wide, which makes sense given the size of the pack. However, there are two load-lifters blocking it. If you get a Hydraulics LT, which is also 8" wide, you need to completely undo the load-lifters to get it in. The depth is also an issue, and requires quite a bit of force to open the hydration compartment wide enough to accept a full bladder. Since I wanted to use a bladder pretty much every time I used the pack, this was a no-go. I realize it standardizes production, but there's no way you need load-lifters on a pack this size. If there was a zipper access, I may have kept it.
Given the above, I recommend focusing on your primary use. Once you add the hydration bladder, you start competing with much better options.
Hiking: For 20$ more, you get the Manta AG 20, which has a little more space, a larger bladder, and AG suspension.
Biking: For 10$ more, you get the Raptor 14, which has similar usable space plus and awesome hydration bladder integration and is probably the best alternative.
Running: For 20$ less, the new Duro 6, which is what I'm going with, should carry significantly better than the Talon while running, and actually has enough space for a 1.5L bladder plus shell and snacks which would cover you on most short hikes.
If you're not going to be using this with a hydration bladder, this is a great pack. Otherwise, there are much better options.