We have a plastic crate…I think it is a vari kennel, but can't be sure- but it is at least that type. We had a wire crate in the beginning, but it was too big, he had enough room to make a messs and get away from it, so he got the point where he would go to the bathroom in his crate, and then lay down on the other side. So, we got the smaller crate. He doesn't mind going in his crate when I leave for work, but it is not his favorite place to be. He doesn't usually go in there without being asked to, but he doesn't try to escape.
It was funny, when my parents were here, he got to stay out all day with them while I was at work, and then he was sleeping in bed with us. After the second day of this, at about 9:00pm, he got up from the couch, trotted over to his crate and lied down inside, with a huge heavy sigh, and took a nap. I think we were wearing him out.