First- lots of space, and big enough to hold two pro sized (Nikon F4S) cameras and other gear.

Second. More than enough room for a big laptop in the computer compartment...

However, the sternum strap, used to connect the arm straps is connected with a sliding cut-out tube, as are a few other straps on this bag.  One of the sternum straps managed to come lose while NOT in use.  If it had been during use, at least it would have still been connected to the strap on the other size via the buckle and not disappeared forever.  Basically these straps are connected to the bag with little sliding tubes (you can see what I mean by looking at the photos)that slide along a "rail." These tubes are open on one side...which means there is not a 100% loop or enclosure.

I may have received one that was put together wrong or a victim of bad quality control. however if  it comes lose under no load at all, how long can you expect this connector to last in "real life" under the prescribed use, which is to help distribute the load by pulling on the arm straps.

Pretty disappointed in THIS bag, but I have another Lowe bag with different sternum strap system (closed loop, which makes sense) and its just fine after nearly 3 years with heavy loads.

In my opinion, having a connector that is completely open on one side may be gee-whiz design, but in practical use poorly thought out and apparently poorly tested.  If you've hauled any kind of backpack with a heavy load you know how helpful the sternum strap can be.  Looks like they overengineered and under-tested the slide lock system.

To get this fixed, I clicked on the LowePro websites link for "parts" and was simply sent to a page that says "go to your local distributor."

When I did they they told me Lowe doesn't have these parts to order, and I had to send the whole bag-which is still looks new enough to pass for unused--to Lowe for two weeks.

EDIT- Seven weeks later(!) I did finally get the free replacement from Lowe, a brand new bag no shipping fees. So good for them for coming through. But same exact design, and hopefully it won't have the same problem again