I have a 45 lb dog who is very uncomfortable on the wood floors in our new apartment, and his old beds just weren't built to stand up to hard flooring.  After taking a day or two to warm up to these, he no longer exclusively lounges on our couch.  He sleeps through the night (or at least isn't waking me up anymore!).  Given the price, I'm pleasantly surprised.  The covers are reasonably presentable and look like they'll hold up for my purposes, but my dog is not rough on his beds.  This is NOT a memory foam bed --this is egg crate foam.  A nice way to look out for your dog without spending a fortune.

EDIT May 2016:  These mattresses have finally been crushed and wont bounce back, I am looking around for new ones. Overall still extremely happy with the value I received with this purchase.