The reasoning behind the accommodation not being a rat-infested oubliette is because they have not been convicted yet, generally. They were held there before sentencing not after. Though frankly I see a small, bland room with a cramped desk and a narrow bed so I don't get all the comments about luxury. I think you could hang prisoners by their wrists and the same people would complain about the inmates getting a cushy life inside.
well it is rather relative - they get single rooms, TV, desk, computer etc.. Milosovich had more of an apartment set up with a separate office for his computer, fax machine internet access.. decent recreational facilities... basically the rooms vary from something akin to a student room in a halls of residence to a mini apartment