I was given a ARB one as an extra when setting up the vehicle.
It sat on the roof rack whilst doing the Gibb River Road, Tanami, Oodnadatta and Birdsville tracks with no dust.
Just recently, I went fishing/crabbing with a mate. We pulled down camp and left all our gear just above the high water mark and set off to pull in all the pots.
When we got back our version of high tide and the oceans were about a metre different. She won and my ARB bag full of gear was rolling around in the surf zone.
Nothing was wet inside, so it gets my vote.
Cheers
Bill