I installed an additional 6 concrete anchors on the shelter to augment the 12 it came with. I also think the round shape will tend to deflect a lot of debris that a flat-sided shelter might not. My sound deadening stuff should be here Friday. I'm anxious to see how it works out.

There is one shelter that looks like the one in Cav's picture a few blocks away except it's concrete. Another underground shelter just up the street that's full of water. Another reason I didn't want to do an underground shelter. A lot of people question the steel shelter vs lightning issue but apparently that's not a problem. They act like a Faraday cage apparently. And if you're still worried about it you can always drive a grounding rod into the ground and attach a ground wire to the shelter. Apparently electrical shock isn't an issue.

This guy is an engineer at Texas Tech where they do all the storm shelter testing and he seems to think above ground shelters are just fine: