Not worth it
I bought this for my Shepherd Mix who gets really hot in the summer. Here's the main reasons I say to NOT buy this: 1) unless you're really strong, moving this thing once it has water in it is VERY difficult. It's so heavy once it's at the right amount of water. 2) the foam on the inside does not stay in place - while changing the water, the foam went to the bottom and twisted, so I couldn't get it back in place and the bed can't lay flat. 3) Since you only have a 1 inch hole to fill it, that's also the only way I could try to straighten the foam, which then ripped really easily. 4) Within a few weeks, it has ripped in several places. 5) I live in a condo, so I don't have an outside hose to full this thing up. Try putting that much water into this thing without one and what do you get? A big mess, and a pain in the you-know-what. 6) No matter how much I try, I can't get it dry enough to prevent that awful moldy smell.

My dog didn't seem to care for it. I kept putting here there, giving treats on it and everything, and she would rather be on the kitchen floor. I even bought the CHEAPLY MADE cover for it. Cute idea, but no go. I can't recommend this product at all.

good bed...but dog won't use it
I bought this bed over a month ago for my ten year old, 27 pound Corgi who looked miserably hot and was always panting in the almost 90 degree August and September heat. The bed was easy to fill up, (be sure to put a towel or something to soak up the water that misses the spout). The bed does what it claims, but my dog barely fits lengthwise on the bed so be sure to measure how long your dog is before purchasing.
After a month, I've yet to see him lying on the bed. I've tried giving treats, having him lay on the bed while I pet him, and other forms of bribery, yet he would rather sleep on the concrete. It's too bad I can't use the bed...

Waste of money....
I bought this for my Siberian Husky who tore it to shreds in less than five minutes. It is deemed "durable"... of which it is NOT. I wasted close to $40 on this junk. I don't recommend it, especially if you have a Siberian Husky.

Cool but will not use
My australian cattledog has an illness which makes it difficult to regulate her body temp. She prefers to lay on the floor of the shower - I thought by getting this bed that she would spend more time with me. She refuses to lay on. I have tried all kinds of things to get her to lay on it but as soon as that water moves or makes any kind of noise - off she goes. The same goes for my other two. They refuse to use it. They snatch the treat and off they go to some other area. It's been a futile effort.

Great Product!
I have a black-tri Aussie who is hot all the time. She is constantly seeking out a cool spot to lay. With 90 and 100 degree weather and no AC, I was worried she would get over-heated this summer. The cool bed was a welcome relief to the heat! She loves this bed and sleeps on it all night long. It's also easy to move around, even when it is filled with water. My Aussie gives this wonderful product four paws up! I wish they made one in my size!