Just purchased my first VeSync Core 400S Smart True HEPA Air Purifier, and I can tell you it will not be my last. Looked online and checked out numerous products from various manufacturers and was drawn to this product due to the reviews, Bluetooth capabilities and it looks. Set-up was simple and connected to my network with no issues. App is great and works well. Would highly recommend this product and I will be looking for future sales to purchase additional units of various models.