Mikewrote a review of Osprey Packs Volt 75 Backpack - 4,577cu in on April 1, 2015
Familiarity: I've used it several times
I bought this as an upgrade to a GoLite Quest 65 for the extra 10L in capacity and to retire the GoLite after several years of faithful service.
My initial impression was that was a 5-star pack at a 3-star price! I have not totally departed from that impression, but use in the field has highlighted some minor flaws.
First the good stuff:
The suspension system and pack cloth is designed to handle whatever you throw in here. I have comfortably carried 50 lbs loads over hill and dale without discomfort. The pack cloth was a pleasant surprise as I expected something thinner for a 3 3/4 lb pack - it's burly and light.
The "extendo-matic" hip belt works well which is key to a pack with a fully-adjustable torso length.
The pack has a sleek design (obvious from the pictures) that rides well and doesn't grab any of the passing branches. The stuff-it pocket on the outside is great and has accepted everything I've shoved into it. One little feature on this pack and other Ospreys is the Stow-On-The-Go trekking pole holder. It works well enough if you are walking on generally even terrain and trying to look at a map or something, but it is not the best option for a rock scramble.
A few cons that knocked a star off my rating:
The bottle pockets are huge but they're not designed to easily pull a water bottle out or put the bottle back. That said, they each fit 2 x 1L bottles.
The hip belt pockets are difficult to zip shut. My own fine motor skill challenges aside, it usually takes an extra hand to hold the pocket taut while I zip it shut. Beyond the zipper challenge, these are plenty big for a point and shoot camera, compass, pocket knife and a snack bar or two.
Some have mentioned the hydration pocket - I use the Osprey 3L bladder and haven't had any problems. However, if you try to stuff another brand's bladder in the pocket that does not have a spine board, you will be challenged to stuff it in there with a full pack.
Overall a great pack for the price.