I worked with a group of contractors who basically worked that. 12 hours a day (if everything worked right - and it usually didn't), NO days off, except for one 24 hour period every 30 days when they had to leave the country because of some visa thingee.
I would kill for 24 hours period every 30 days.KBR gives us vacation every 120 days. The new company that is taking over our department in a couple of weeks is offering a vacation every 90 days. Its better but its still 90 days straight of work.