content: There are many whiz-bang features that sound impressive but are of limited use in my experience.The basic functionality of this program is impaired. The user interface in not that intuitive, the graphic response is extremely slow, the lack of a functioning "undo" is maddening (in the Edit menu there is a "undo" button, but it is never available). I found working with this program to be very slow going, frustrating and tedious, and I found the payoff (seeing a new home in 3D) to be unrewarding. The 3D view is not that helpful; it is so difficult to control the movement within the 3D view that it is hard to concentrate on what you've just created. Also, you can't walk up or down stairs.I spend a lot of time working with complex audio/video programs and this is, by far, the most frustrating program I've ever used.