Bulldog case - Bulldog Cases & Vaults 8.7x6x2.5 Car Safe - Steel Pistol Strong Box w/ Key Lock

The case fits nicely under my seat and plenty of storage room for valuables. And, it's heavy enough to stay put under the seat rather than bouncing or moving around.
Pros: Size, price, and usability

This review was written in the old system and had content requirements that are different than reviews written today.