The gasket seal actually works — I left this outside through two rainstorms and everything inside stayed bone dry. The 82 QT size swallowed my winter blankets plus a few camping tarps with room to spare.
I keep this on my back porch for extra blankets and it's stayed completely dry through two weeks of rain. The gasket seal actually works, no musty smell at all. The latches snap shut tight enough that I don't worry about mice getting in.
After hauling this to a camping trip stuffed with blankets and clothes, it came back completely dry after a night of unexpected rain. The rugged plastic feels like it will survive years of abuse in the garage, and the lid snaps shut with real confidence.