I briefly (for 2 weeks) tried the uberman schedule at a time when I was extremely busy, and really needed a few extra hours. It wasn't much fun, and I had the typical problems I see on people's blogs, like accidently sleeping for 4 hours every now and then, etc. But, I was slogging through it. I didn't feel like my health was deteriorating or anything. Just bouts of extreme sleepiness.
Then I read this rather long article
, which more or less convinced me to give up. It's a bit sarcastic at times, and I normally ignore such negativity, but I did have to admit that the article made sense to me. I also had to admit that, other than Steve's blog, I don't know of any credible blogs of people who have sustained polyphasic sleep. And, even Steve gave it up after a few months. Anyone know of some long-running, successful examples?
Because of my personality, I still get the urge to try it again, every so often. I make sure I re-read the linked article every time, to remind me of what I'm considering getting myself into.