I am reviewing this from Australia. After many, many inquiries I was finally able to purchase this conditioner. At the end of the day, it was quite expensive for me to do so. I've had it about 2 years now.I was under the impression that it would last longer than this (being made in the US) even though the warranty was for only 12 months duration. Mine has developed another noise (outside the usual 'white-noise'). It sounds like a bearing is failing; as its rather a 'tapping' sound. Interestingly, this is a simple machine to produce. It's made up of a miniature fan mechanism (yes, with blades and all). I'm just wondering if I'd be better off replacing it with a miniature desk fan and sitting that beside my bed (directing the blades away from me when it's cold).Despite the above the conditioner has worked well in the past to assist me to fall and stay asleep by blocking out irregular noises. With this extra noise, it fails to improve my sleep now.