My expertise in do-it-yourself projects requires that I am constantly on the lookout for dependable and high-quality materials that I can incorporate into them. My interactions with the Northair online store, unfortunately, were not even close to being satisfying. My air purifier, which I purchased from them, was not well made and did not perform as described in the product description. When I asked for assistance from their customer service team, they did not answer quickly, and the solutions they provided were not beneficial. It took quite some time and a number of phone calls before they eventually agreed to repair the defective item. In addition, I was dissatisfied with the general quality of the things that they offered. Because I am an expert in do-it-yourself projects, I place a high value on things that are durable and can endure repeated use. Nevertheless, the air purifier that I bought from Northair had a weak and poorly manufactured feeling to it. In general, I do not advise anyone to shop at the Northair online store if they are looking for dependable and high-quality goods. As a do-it-yourself expert, the standards that I expect to be met by a company are not met by their lousy customer service and subpar products. Avoid the trouble and go shopping somewhere else instead.