Anyone tried a covance study?

I am thinking about doing a covance study. ive look intensivly on the internet and all i found were people telling you its not worth it, but havent actually tried. i know there is risks and i know what they do. I'm looking for someone who has actually done a covance study, and can tell me detailed information about how you were treated, what is was like staying there, entertainment. rooms, sleeping, other people you stayed with, ect. if you havent done one i dont care to hear what you have to say. remember no answer is too long, i will mark as best the first good answer i get. thanks.