>>615879I have the kestrel 38 and personally, I think it's great. I use the 3 litre osprey hydration system with it and the only drawback of that is that the handle on the damn bladder takes up a fair bit of space inside the pack when it is filled to capacity and placed in its compartment.
Saying that, I still can pack in enough gear for up to 3 nights with it from early spring through until mid autumn. I use a larger pack in winter for my larger sleeping bag and extra clothing layers.
Pic related. My Kestrel packed away after 2 nights /out/.