yes, they're great, we got ours at rockbottom and attached them to a matching crate where they sleep in...the crate has a divider:
http://www.rockbottompetsupply.com/category_s/16.htm
we divide the crate in two so each dog has their own 'room' and one end for a pup where the potty pad goes. I put their food bowl in the middle. as mentioned prior, be careful about climbing while you're gone...our little girl is a houdini and has scaled it several times. We've put tops on them to prevent this. Rock bottom's prices are much cheaper than petsmart/petco/petpeople and they're of similar quality if not better (nice and thick). The stuff they sell at our local Walmart is definitely much more flimsy. When we visit family, the ex pen folds up and comes along with us for sleeping and to prevent them from falling into our parent's deep fish fountain in the garden. Multifunctional!!