I first saw these when they came out a few years ago and was pretty impressed with them... but the price was a little steep. However, for bringing Cooper home, I thought it would be the best route to go for travelling.
I actually purchased this one at the p.s. where I used to work, and the price wasn't too bad since my former boss gave me a $25 coupon for it. Later, I found them at a farm supply store for 1/2 what the p.s. was charging though.
Originally, I think they only made X-small and small (the one I got is a small) but now I've seen the larger ones in a few places. The larger ones, if I remember correctly, are completely rectangular in shape instead of "barn-shaped" and were a darker color.
Anyway, I'm really glad I got it. I'm used to Doskocil kennel cabs that came in two pieces and took forever to disassemble/reassemble because of all those wing nuts. This one folds down and reassembles in the same amount of time it takes to do one set of wing nuts, and is REALLY sturdy once assembled.
The mfg. claims that they are approved for airlines, but I was told that airlines don't allow for collapsable kennels, but Nylabone offers a "kit" of some sort that makes the assembled kennel legit with the airlines. I can check into that if anyone's interested.
Just thought I'd share.