Bests & Worsts Reviews from Amazon

I have had one of these for years that I still use in my 4yo’s room and it works great. We purchased a second one when we were expecting our second child and that one has been tempermental since we started using it about 5 months ago. At first it would take a couple seconds to turn on, which I honestly did not think much of but that got worse. Now it starts fine 80% of the time but takes up to 15 minutes to start whirring a couple nights a week. I could live with that; just a mild nuisance. What really has me upset is the inconsistent sound the unit is producing after a few months of use. Instead of a steady white noise, it sounds as though the rotating parts inside are not spinning smoothly and it makes emits a loud chirping sound. It is very disruptive rather than relaxing which renders it basically unusable. I have also seen other reviewers mentioning the difference in the low mode volume in newer versus older versions. I can corroborate those claims, but we only ever use the high setting. I am very disappointed with my second go-around with the dohm. I will have to find an alter alternative and I have stopped recommending this to friends.