This pack is the perfect size for a summit pack or for single day / super light alpine adventures. The lid closure is simple and reliable, the internal 'ninja pocket' is incredibly handy, the lid pocket is waterproof (as advertised), and the ice tool attachment is the best I've ever used (simple, secure, and I can get an axe out without taking the pack off). I've used this pack for rock climbing, alpine climbing, hiking, travel, and ski touring and it has been perfect for all but ski touring (ski carry is possible with addition of a strap through the ice axe sleeve , but it's a little fussy). I've even managed to pack enough to do some 2 day climbs (bivy, no tent). I generally don't use the waist belt (which is easily removable) and I've found the shoulder straps to be well shaped and quite comfortable even when the bag is packed to the brim. The exterior fabric has been quite durable, but it does show dirt.
What isn't good about this bag? The body of the pack is absolutely not waterproof and after a little bit of use it is hardly even water resistant. If I could change one thing about the bag it would be to switch to a durably waterproof fabric. Second, the back pad while technically removable (for use as a sit pad / emergency bivy), it is not practical to use it this way. I would prefer if it was easier to remove (like Cilo Gear packs, for example). That's it really.