To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
I have been using this machine for 5 months now for my baby and the machine is already wearing out, popping sounds are coming out of the speaker and I need to get a new one now. No complaints other than that but if you plan to use it nightly it'll wear out :(