I would probably be passed around like a warm slab of meat. Solitary confinement doesn't sound too bad. Pretty much what life is like currently.
No way. It is nothing but four white walls and barely room to lie down. Maybe a mat to sleep on with no pillow. You never know what time it is, day or night.
You might get a sandwich with bologna drenched in sodium benzoate and a glass of water a couple times a day.
You might be able to figure out the time of day based on when they serve your "food", after a few days.
It is designed to strip you of your sense of self and break you overnight.