So far, so good. I bought one of these a few months ago, only since my wife and I seem to have become more sensitive to spring pollen, which was particularly heavy this year. Due to the early positive reception of the first unit in our bedroom I bought two more to place in other parts of the house where we normally sit during the day. The first unit arrived with a defective WiFi controller board and the WINIX representative was easy to contact and was very helpful in getting a replacement unit quickly. All three connect to the internet with no problems, but the usefulness of an internet connection and an Alexa connection is negligible as the device works pretty much on its own. It detects increased contamination and switches to higher speeds until the problem is resolved. At lower speeds, it works very quietly, almost imperceptibly. The sleeping block didn't bother us at all. Turbo mode, top speed, very noticeable but still not overwhelming. Based on the first 15 days of cleaning the pre-filter, it picks up a lot of dust, dander and pet hair. I would buy them again and plan to buy 1-2 more in the near future.
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