> When I get under 6 hours I see a clear drop off in performance. Same. I have a hard line at 6 hours. Over 6 and I'm good, less than 6 and I'm dead all day. I

> When I get under 6 hours I see a clear drop off in performance. Same. I have a hard line at 6 hours. Over 6 and I'm good, less than 6 and I'm dead all day. I don't use an alarm and wake up naturally after around 7 hours of sleep, but that last hour I'm normally aware of the lighter sleep stage I'm in.