Josh Repmanwrote a review of Osprey Packs Kestrel 48L Backpack on September 28, 2019
Familiarity: I've used it once or twice and have initial impressions
I've had a handful of pack on my back over the last few years and out of what I've carried, the Kestrel's features surprised me the most. So much thought put into the little details, beyond the weight carry of the pack. More on that later. What impressed me the most is the accessibility of the hip belt pockets. Just with in reach when you need them, but out of the way while you're moving. There's plenty of space for snacks, chapstick, suncreen, pocket knives and even a Go Pro if you wanted.
Back to the way the pack carries the weight of your gear. I took this out for three days doing 21 miles in the desert and about 17 of which was river walking. No easy terrain to say the least. Overall had about 35-40 pounds, add water and you have a standard mix of lightweigh backpacking. After a few hours wading around to avoid boulders and deeper than desired pools of water we would take our breaks and to tell you the truth, after hearing everyone moan about their packs, I had gotten excited because I had no extraneous pains or aches. Anxious to cover ground and see the views, it was easy to put the pack on, get in the zone and cruise.
There's plenty of space internally for extra layers socks and underwear. Meals for four days, stove, cookset and a toiletry bag. The integrated raincover was enough to protect the bag in addition to the tent and camp chair I had attached to the outside.
All in all, very impressed with the bag. Only reason I can't give it five stars is because I don't own it and cannot speak on behalf of it's longevity. If I know Osprey though...No concern there.