I have one, I really don't use it though. Though it said it was "light weight" its almost as heavy as the wire ones, and a bigger pain to set up. I did not get it with intentions to leave my dogs in it if I'm not around...its fairly heavy duty for a "soft" crate but they'd destroy it if left alone in it.

I have a really cheap pop up soft crate too, $20 at target, I've used it much more because its easy to transport (small, very lightweight). Its already pretty beat up though, and that's just from Keva sleeping in it at night while we were camping. It doesn't take much at all to tear holes in it.

I have both plastic and wire crates, and I find the wire crates, though they are heavy, much easier to use when traveling. Plastic crates are a pain...if you don't take them apart they are hard to pack around because of sheer size (a large dog crate, at least) and if you take them apart, it takes forever to screw back together the top and the bottom, put on the door, etc. But that's just my personal opinion.