Yes, the comparison above is accurate...with Tornado Alley Armor's modular design the difference really is that dramatic! Our safe rooms can be completely assembled using nothing more than a pair of end wrenches. Anchoring requires one additional tool, a hammer drill (or better, a rotary hammer), to drill the anchor holes into the concrete slab. Just take a look at the array of equipment "the other guys" need to install virtually all of their above ground and under ground units. Our simple assembly and tool requirements makes a Tornado Alley Armorinstallation well within the capabilities of most DIY'ers.