I had an officemate back in the mid 90s who was on this schedule for several years (he was a researcher able to set his own schedule for office time) and it worked quite well for him. He seemed to enjoy it and talked at length about how it was closer to the natural circadian cycle for people (which is a claim I don't know about.)

He did great work during that period; obviously this is just another anecdote but there you go.