Overall, the material it is made of is good and it seems to be a nice design. I like the idea of attaching something to the side of the crate that my puppy (10 weeks) would entertain himself with. I was disappointed because first it was hard to remove the cover after it was in the freezer (since the peanut butter had spread a bit and acted as “glue”). Then, it became quite messy in the crate. Peanut butter went on the side of the crate when sliding the Groov into. My puppy (Golden Retriever) licked it for a while, but not all. Then when he was moving around, he put some on his fur. And what he did bit finish just dripped off. So, overall, a mess. No benefit, play value or calming down value or teething value. I left 2 stars because the materials are good. A let down and a lot of money really wasted. Disappointed because the crate itself is awesome.