Went there again while I had out-of-town guests. One of the best places to take guests since so many people have heard of Frank Lloyd Wright. The docent was quite informative and entertaining. Since I had gone on the tour prior, it was good to get a refresher course. It's all self-sufficient since they pump their own water, and I believe it's all powered with solar energy. The architecture and views are breath taking. The students were hard at work. What's there left to say that hasn't already been stated.
It's a good idea to buy your tickets in advance. If you try to buy them on site, you risk having to wait for the next tour or perhaps even being turned away, especially in the winter or cooler months. There is walking outdoors. So comfortable shoes are a must since the tour is 1 1/2 hours. It's not all walking since they allow people to sit when the tour heads indoors.
I won't post any more photos since there are now over 600 already posted. A definite must see.