Loki HATED the plastic crate, we ended up getting rid of it. He was fine in the fabric one and the wire one (more than fine, when asked to go to his crate he immediately curls up in a ball and naps, i love him) but he cried and barked and freaked out when put in one of those plastic ones. Again 2 wire crates are going to be your best shot for "crate training" If you are looking more for simple confinement at work, this is what we have:
Dog Crates: Sof-Krate N Series Dog Crates at Drs. Foster & Smith
I like it because the top and sides open. Who knows why they like it but they do. They are sleeping in it right now.