I have purchased two of these items. I liked the first item so much that I purchased a second one. Unfortunately, when I opened the second one, it immediately had a HORRIBLE clicking/grinding noise coming from the fan area. I returned the item for a prompt refund. I thought it might have been a fluke, but that appears not to be the case.I really hoped that the first one would continue to work well, but it too is now beginning to show signs of the same clicking/grinding noise only a couple weeks after we set it up. While it is bearable at this point, I have a feeling it will get to the same unbearable point that the other one did.If you decide to purchase this product, I suggest that you keep the packaging for the 30 day return window, just in case you have the same problem I do.