Has anybody here had experience with Geodesic Dome houses?

I saw a really cool one as a child, but it was just a model and built for just one person. I’ve seen several really cool homes since then and I know that there are companies that pre fab them for you. I also see that you can now have them made from concrete. I was wondering about the insides and how effectively the space can be divided, and if there is lots of wasted space. I also was wondering about heating and cooling issues, if it’s lots more expensive or vice versa, stuff like that. Anybody?