[justintrtle]

I tried it for ~six months during undergrad, mid-'00s. I didn't feel sleep deprived but I disliked feeling so out of sync with everyone else.

My biggest complaint was the feeling of time being seamless. My six sleeping periods were all of the same length, so I sort of lost the feeling of a concrete 'yesterday' or 'tomorrow'.

[erikschoster]

I had a very similar experience. IIRC I did 90 minute naps every 4 hours for a week. My first full night of sleep after a week of 90 minute naps felt like waking up after one really extremely long and weird day.

[xtracto]

That's interesting. Maybe it could be a sleep pattern to be adopted when traveling to space for long times, or during other isolation processes.