I suspect the first week or so will be quite hard.
And yes, it's not really very applicable to people who have work or school...
Luckily, I have neither, making me a perfect candidate.
Ha. I didn't know people had invented terms about sleep cycles.
Anyway, I have had this "Uberman sleeping cycle" (and "dysmaxion sleeping cycle) you're reffering to (even though I didn't know they also had names) out of necessity when I was a student. I was the kind of student that was bored studying through the year (procrastination FTW), and instead dedicated 2-3 weeks of full time studying right before the exams. And since 2 weeks weren't enough to understand and memorise thousands of pages of political theory, sleep deprivation was necessary.
I remember I used to study for 2-3 hours then sleep for 30-45 mins then wake up and study again every day for at least two weeks. What I noticed was that my memory was much clearer, and my learning capabilities were much higher, same with my understanding of complex notions and ideas. On the other hand, it affected my diet, I was nervous all the time, my eyes twitched, sometimes I just couldn't understand what I was reading and I had to read it again and again, and some times It was impossible for me to communicate with people (as if they were talking to me and I couldn't picture their words). I also used to have this feeling, especially at late night, that some sort of epiphany would come out of nowhere, as if I would understand everything. I don't remember anything else. Note that I used to consume 5-6 cups of coffee every day, and I smoked about 2-3 packs of cigarretes, so it may have had some additional effect on me.
What I do remember is that, right after the exams, it would take me a whole week to be used to sleeping normaly again. I would just wake up after 2 hours of sleep feeling like I had slept for days.