we have had this product for 2 years now and are very happy with it, we've permanently got it on it's charger in the kitchen and can hear it all the way through the house if need be. it's been reliable, easy to use and the sound off function is useful, as you can see the lights which often is more than enough to tell you what's going on. (see them scream/sleep instead of hear them scream/sleep) as already mentioned elsewhere, the parent unit battery life is poor, but if you don't plan on carting it around everywhere this would be an excellent choice. tomy do a replacement battery pack for about £10 online. all in all very happy.