I am so bummed. I can't find the legs to the rnp I used for my daughter 4 years ago. As far as I'm concerned it's a must have so I have to buy a new one. I see now they have them with a built in vibrations and even ones that automatically rock. Does anyone have the auto rock one? Just wondering how it works for you? Do you plug it in or is it battery powered ? Is it noisy? Worth the $80??