The scheme � which is run by the National Disability Insurance Agency (NDIA) and has been trialled in Midland, Penrith and the Blue Mountains, � recently celebrated its first anniversary in WA.
NDIA chairman Bruce Bonyhady said the progress report showed participant satisfaction with the scheme had been very positive.
�Ultimately, the National Disability Insurance Scheme (NDIS) will improve the lives of more than 400,000 Australians and their families,� he said.
�We owe it to every one of those people to make the NDIS the best scheme possible so it is encouraging to see very positive feedback.
�Importantly, for all Australians, the report said the NDIS is being delivered on time and within budget.�
Mr Bonyhady described the scheme as �one of the greatest social reforms�.
�As a country we should be proud of the progress,� he said.