I did polyphasic sleep for three months. It is possible and it does work, but what is overlooked is how perfect your sleep schedule needs to be. When you're hitting all of your naps perfectly, you're really not ever tired and you wake up without an alarm usually.

But... if you miss one nap, life is very difficult for a good 24-48 hours. Miss another nap in that timeframe and the problem compounds. Maybe this mask will help with that, or maybe not-- I have no idea. For me the problem was being near a good sleep location every four hours. I'd try to sleep in my car, but a third of the time or so I wouldn't be able to sleep and I'd be screwed.

Anyway-- I'm glad to see people working on this. I've thought about getting back on it, but the completely hellish 5 day transition period and rigidity have held me back.