I bought this out of sheer desperation simply for the “ok to wake” function. My 18 month old had been waking between 5 and 6am for over 6 months, and literally nothing I did helped him sleep any later. We already had a cheap white noise machine, so when I first heard of this product, I balked at the price, thinking I didn’t need it for the other features. I first purchased a cheaper “ok to wake” product, but found it difficult to operate, and poorly designed and made. I finally purchased the Hatch Rest, thinking if it didn’t work out, at least Amazon would let me return it.... I actually loved this so much, that I bought a 2nd one for my 3 year old.