Quality I love jamming with my friends to the cat keyboard. I used to be self conscious about my music abilities but this cat piano has turned that all around. Now I can play like Billy Joel and Vin Diesel. It changed my life and now I am eternaly greatful for this app. If you want your day, or even your face, to go from a low 3 to a solid 7 then I would recommend downloading this app. Heck I'm going to buy another phone once I've finished writing this review just so I can download it again and have two copies!!!