After reading everyone's post I am grateful to live in Australia. Getting the mobility allowance and the disability allowance is just one interview and then that's it. There are no more assesments. I have been on it now for five years. The disability that is, and unless things change in your condition you stay on it. You do need to call centrelink if there are changes to your health, but no waiting after letter from doctor. A month at the most, well that was for me and others I know. Some people do have problems though, but I have found these same people apply for it for health conditions that they could still work part time. All the best to you all.