If you are a Frank Lloyd Wright fan it is a must, and you get to see Woodlawn Plantation for the one admission price. If you belong the the National Registry for Historic Pres. it is free, but bring your card as they have no way to check your membership.
The house is small but quite interesting. Have been there twice, and both times had excellent docent led tours. Note that little children would probably be bored and there is little room in the house to move around, also not handicapped accessible