Oh yes, this hydration pack works!
This is a great day pack-it has already proved itself. The bladder system works easily, slides in with dedicated space for a day's stuff- light rain top & bottom, xtra layer, 1st aid kit and trail food. I actually bought an extra 2L hydration insert to go with the 3L that comes with the pack so I have more flexibility. Bite valve works well but be careful of the magnet locator- keep it away from your compass! This is a light pack and the pockets on the outside provide good flexible stowage. The trekking pole loops work well and the integrated rain cover is a plus. You get what you pay for- this is Osprey and worth the $$. I'm very pleased with this purchase.