The only drawback I see to a dedicated, stand-alone storm shelter is the fact that you need to go outside to get into it.....Two nights ago we had some tremendous straight line winds come through, a lot of folks lost roofs, barns and trees but thankfully no serious injuries. But, this happened at 2:30 in the morning, when the first warning most had, (myself included) was awakening to a tremendous roar. By the time we could get shoes on the family and out to a shelter, it might be too late.....a lot quicker to run downstairs to the basement. I do acknowledge the possibility of the house collapsing, but I wonder how many times that has actually killed someone, especially when compared to the many lives saved by those who took shelter in the basement?