After 15 minutes, without any particular action, furby became nasty, farts and belches constantly. To do become nice, to pet it for at least fifteen minutes and after he starts to sing nicely, but it does not last very long. Well, that is the subjective part, even though I do not see the point of an evil toy.
However, small problems objectives is the absence of stand-by button or volume control, because that little thing makes a hell of a racket, and we would like to turn it off without removing the batteries .