Last year, I purchased the Geo-Dome 18. It’s been great having it because I use it as a greenhouse environment. My neighbor purchased one three weeks later, because he was so enthused by it. They definitely sell themselves. Some other friends are interested in having one too. I am trying to sell them on the 18′, because of how much more versatile this size can be for a garden environment. I call mine ‘a tropical greenhouse’ due to the fact that I have fruiting papaya and banana and pineapple, plus regular vegetables!