I just got one, but will returning it. From previous comments I had hoped that it was a tall pack, but that is not the case, it's merely not a short pack.
Unlike Luke, I want the pack to stick up well above my shoulders, this helps keep weight on your hips and over your feet. Load lifters should come down at about 45 degrees for the most efficient carry. Of course, that is for a pack of this size (~50l) and packed weight (~15-25lbs). If it were smaller, for a lighter load, I'd be quite happy with the length.
This is the 45 and it is huge. I wish it were less 'deep' to keep the weight closer to your back.
For me, a few inches taller frame, along with a pack bag that was shallower front to back would have been perfect.
The frame length is about 24 inches.
That means, the overall pack is about 25" tall, and 11" deep. For best carrying with heavier loads and to keep the volume from getting too huge, I think a ratio of 3;1 or so is better, say a 9" deep pack that is 27" tall.


The lumbar pad sticks up above the hip belt, and creates uncomfortable pressure at that spot. I love a good lumbar pad, but this one is to high up.

The top of the bag does not have much of a collar to form the roll top, a little more fabric here would make that easier.