Definitely worth visiting if you are a Frank Lloyd Wright completist. Our guide was keen to explain the architectural principles of the house, although we're not sure that his method of asking questions of the visitors was always easy to follow by those who did not have English as a first language.
Unfortunately our travel plans did not allow us to do the neighbourhood walking tour, but I'm sure it would be worth adding on as we saw lots of interesting buildings as we approached the house, and the other audio tours we took in Oak Park were excellent.