Shows some use but in great shape.  No rips or holes. See photos.

Manufacturer info:

The Crumpler Beer Back Computer Backpack is a 700 denier, water-resistant nylon bag that will carry up to a compact 17" screen laptop computer such as; Apple 17" PowerBook or MacBook Pro. It has a removable laptop insert that can protect the laptop outside the backpack. There are exterior and interior pockets and a carrying handle. The backpack has D-rings accessory loops & retro reflective strips on the harness straps plus a spine slot back pad and chest strap. 

Water-resistant 700-denier nylon backpack with removable laptop insert
Compartments 
  • Main compartment for files and magazines 
  • Fully padded removable laptop sleeve with 6-pocket organizer 
Pockets 
  • Two external covered & gusseted zip pockets 
  • Two interior pockets 
  • One mesh interior pocket with zipper 
Two accessory loops
D-rings accessory loops & retro reflective strips on harness straps
Carrying options 
  • Backpack strap has a spine slot back pad and chest strap 
  • Carry handle 
Compatible with 
  • Most 17" laptop computers 
  • Apple 17" MacBook Pro laptop computers