I have the Dakota Safe and I am thrilled with it. The best part is I got it for $500 out the door from my local "farm store"
Be prepared to make 3 minor changes to this "safe" to drastically improve it's performance and security.
#1 buy 2 sheets of the 1/2" fire resistant drywall, and cut to fit, following the pattern of the existing interior panels. You will end up with almost no leftover, and almost 2" of fire "proofing". The door requires a little more creativity but there is plenty of room to add more fireproofing. Wrap your new double panels up wth sports tape before assembly to make them easier to handle. Use paint and stencil the panel numbers on the back side of the interior panels to aid in re-assembly the second time.
#2 Drill extra holes in the rear/sides that correspond with your studs, and bolt it to a minimum of one wall and the floor. 2 walls and the floor are better. Mine is bolted to 2 walls and the floor with 16 lag bolts total. It's not comming out without taking the corner of my house with it. While you are drilling, a hole for power for a goldenrod or light is nice.
#3 Drill out the holes used by the bolts to assemble it and substitute 1/2" Grade 8 Hardware, assembled with an impact gun and closed cell weatherstripping tape as a gasket.
#4 [optional, so I didn't count it] The shelf mounting and interlocking system is kindof cheezy. I bought more of the shelf track and clippies and added much more support, but the next time it comes apart I will likely re-think the shelves entirely, probably replacing the mounting system with something better.
I can disassemble this safe in about 30 minutes, and re-assemble it in about 45, with an 18v cordless impact gun. Videotape the assembly process, and burn it onto a DVD, including reading the instructions on lock programming to yourself, and burn it onto a couple of DVD's... You will thank me for that tip.