Did the same not too long ago, and did another near full day a little while back. Have to say it does suck, mainly because it's boring as all hell, though the food wasn't as bad as I expected. All you end up doing is hear other dudes compare the various places they've been locked up. People are surprisingly open to talking about their guilt and crimes, not a shock why their are so many jailhouse snitches, but again, that's just po-dunk county lockup, I can't imagine the tedium of doing any kind of lengthy stay.