We got this for Christmas for our then 9 month old son. He loves pop up toys and he only had an older one with no music or sounds. He loves the music on this and enjoys seeing the characters. We have not had any problem with the doors not opening or music not playing. Sometimes the music doesn't play when the doors open, but only because you have to hold it down a little when you press it and my son doesn't understand that concept. I think it works fine though, that's how it was brand new. Very fun toy, great if your baby likes pop ups.