Keep in mind, this bag does have a Wet Bag on the bottom that should be pretty protective should you need it.
So far, a great product. I bought it to fit a Dell M6400 Precision 17" laptop (dimensions: 15.4 x 11 x 1.35). While other websites state that this bag will not hold a laptop this size, It does using the main compartment entry and it seems to be close to max. However, this precludes using the side laptop compartment entry. That is made for a smaller laptop (only reason I gave it 4 vs. 5 stars). the side compartments fit the oversized power adapter for this laptop perfect. More importantly is the comfort. With that heavy laptop even using just one shoulder strap it fits comfortably over your shoulder and back, evenly distributing the weight, and doesn't want to slip off when you move around. One of the most comfortable backpacks I have ever owned. Thanks Oakley for a great product (but make the side laptop entry bigger) and thanks Backcountry.com for the great price and service.