I slept the same as usual - better than before I went LCHF, but not as good as I know I need to get to. I usually sleep good for 6 hours, then wake up for an hour or two, then (if time allows) grab another hour. Before LCFH, I would wake up at least every hour. So, haven't noticed a difference.
Day 2. Bring it on. It's not that it's hard (well, if I had to stop @ 1000 calories, it would have been hard!), but it's mentally hard. There are not really "meals". Small feedings without much bulk or substance. But, hey, I can do just about anything for 3 little ol' days. We'll see what info, if any, the trial yields!