With mountain biking, light hikes, and adventurers in mind, Osprey has made a pack I have nothing to complain about.
This is a great size for short or day hikes, it's perfect for climbers, bikers or just about any activity where you want a light weight hydro pack with enough room for some extra food and gear. It's construction shows that Osprey has true adventurers in mind and wants to create a product that will not only hold up to the abuse so many trails often dish out, but that they want you to be completely happy with the product you just bought.
From the stitching to the layout, everything here is top notch. The hydro set up is great with a magnet place on the sternum strap for easy access, and the bag itself (3 liters) is much better then most of the hydro packs you'll find in stores. With a hard back and an over sized screw down lid, the bag is almost as tough as the pack. It's still pretty easy to clean out as well, so no worries there. Lower side compression straps keep the weight from rest only on your shoulders, which provides for more comfort and enjoyment on extended trips. The Osprey wings on the Lower side compression straps are highly reflective as well, providing a nice safety touch.
Good: An front pocket gives you easy access to items you may want to get quickly, large (but not too large) pull rings on all zippers make it easy to get in your pack even with gloves on, plenty of room for a days rations and some back up gear, and a really cool strap for your helmet, 3 color-way choices, good style, great quality. Front pocket is stretchy but strong, mouth piece swivels, bike tool organization, great stitching, strong construction, comfortable to wear, reflective accents for safety.
Bad: .... I've got nothing.
For it's size and purpose this pack is perfect, if it's too small for you, you can get it in one of 2 larger sizes, too big, a size down might work for you. If you don't like this yellow, you can get the grey or green. Bottom line? If you want a light hydro pack that's perfect traveling light, bouldering, or biking... This is a perfect choice. $90.