I did a version of the Paulk drawers. I have some large drawers with a lot of weight. The drawers don't come out, they're quick to build, and no locks to slow access. Drawer slides take up more room than the plywood dados, slides cost more, and if the truck is parked on an angle the drawers open. I have 32 drawers in my truck and if I used slides it would have cost a small Festool! I used beeswax on some of my drawers which makes them move very easy, so easy I had to come up with a stop to keep the drawers from flying out. On the drawers that weren't waxed there is no problems with movement.
Cheers
Curt