I do mostly remodel jobs and many of these are time and material. I am NOT going out of business any time soon, although I have been doing it for 8+ years so maybe my time is about up. When I do quote a fixed price for a job I am gennerally certain about what the job will entail and I seem to make a little more money on these jobs. For peace of mind for myself and customers I have no problem with t&m billing at all.