This tour is totally worth it, even for someone with a casual interest in architecture (me!). The property is beautifully maintained and convenient to downtown Scottsdale. There is plenty of parking on-site. Our group of five arrived at about 1:30 in the afternoon on a weekday and we were able to get on the next available tour.
Our tour guide was knowledgeable about the property and about all things Frank Lloyd Wright. We learned all about his life and his quirks, and about all the people he shared his life with (some of whom still live on the property!). About half of the tour is outside so dress accordingly.