I really appreciate these bowls (I bought two!) and they work well to slow down my little enthusiastic eater. As some say in other reviews, I do wish the troughs were just a little bit deeper to slow her down even more. But they are very pretty bowls and so much nicer than silicon slow-feeders (which our cat chewed holes in and has made them ). The only other thing I'd say is that I wish they weren't packaged in styrofoam and I hope in the future other material for packaging could be used to keep them secure and undamaged in shipping. Styrofoam is insidious! even though we handled it carefully and disposed of it immediately, we still found little bits of it stuck to ourselves and our cats' fur.