In an article from the Seattle Times:
Bravo Company arrived in Afghanistan with 24 Strykers, the first of the eight-wheeled combat vehicles outfitted with high-tech communications and surveillance gear to arrive in Afghanistan. One-third of the vehicles are now out of service due to bomb attacks or maintenance.
The bomb threats are so pervasive that Stryker drivers have abandoned some stretches of road in favor of driving through the deserts on different routes.
The story sure seems to spend a lot of time focusing on negative quotes and experiences of the troops.