I've had a LW bag for 16 years. One "C" check, new zipper and frame piece, a crack had worked up to one of the wheels and I was worried it would break free. Had the zipper replaced another time, it's an old design with the zipper right at the edge of the "top" v. the "porthole" design they use now. Every time it was slung around face down, it was riding on the zipper and final wore out. The thing's bullet proof. It's gone down freighter ladders solo and been wedged in bulk pits. Yeah, it's heavy - so is gold.