The survey provided very valuable information to the Department about our customers' perception of their ULF toilets' performances. The results were overwhelmingly positive indicating a high level of satisfaction. The more frequency of double flushing is a concern, however, relatively high ratings of the ULF toilets among purchasers who double flush more often now indicate that this "negative" performance characteristic was not significant enough to be dissatisfied with the ULF toilet or to dissuade customers from future ULF purchases. The survey was also valuable in developing the current list of approved ULF toilets that qualify for the Department's rebate.