I didnt have much luck with everyman taking naps spaced 5hrs apart. At 4 hrs I always got very drowsy and concentration would suffer. It turns out there are physiological reasons for this, with every 4 hours the body experiencing a small cyclical change in body temperature (See Why We Nap by Dr. Stampi for more info). But, YMMV obviously.
The nice thing about everyman is you can make it work at a day job, IF you can take a nap during your lunch break. Its very ideal for moonlighters as you still feel fresh after work and can code late into the night without suffering the consequences the next day.