Plenty of Room
I got this for my son to carry some of his own gear for our backpack trip this year, and also to use in the fall for school. It's not big enough to carry everything he needs, but that would weigh too much for him anyway. So this is a perfect compromise. Big enough to fit a bit of gear, but manageable enough to keep the weight down. The compression straps are great, keeping everything secure. The bungee storage works great for a light rain jacket. My only complaint: it's not actually hydration compatible. There is a laptop sleeve inside that you can put a bladder in, but no clip to keep it upright, and fitting a hose through the tiny headphone slot is impractical unless you remove the nipple and insert the hose before you fill up the bladder. Either way, it still works, and is comfortable for him to carry around.