This is a powerful air filtration system that should provide years of reliable service. It's heavy and made up mostly of metal components rather than plastic. It weighs nearly 40 pounds, which makes the built-in casters on the bottom very handy. The design is quite simple and doesn't seem to be trying to fit into a high end decor in a home environment. Ideal for offices, classrooms or other large spaces. But it can be rolled into a corner or a less visible place in the house if you prefer. I like placing air filters centrally for better performance. He certainly deserves the designation "military grade". Internal parts and components appear to be of good quality and reliable. I really like the indoor UV lamps, which not only purify the air but also keep the inside clean. You not only have to replace the filter material, but also 2 UV lamps. Remember. A non-UV version is also available if UV is not your concern. Due to the ongoing pandemic, I think more and more people are choosing UV. The filter is rated for 1 amp at 120V, which is 120W. The UV lamps each have a power of 9 W. The air flow is very good. It starts at a quiet 85 CFM. You can then choose between 150, 200, and 250 CFM depending on room size and air exchange needs. There are 2 filters that need to be changed regularly. It is recommended to replace the air cartridge every 6 months. At $100 each, that's up to $200 a year. The HEPA filter must be replaced every 2 years. At $250, that's $125 per year. The UV bulbs were out of stock at the time of writing this review but usually need to be replaced annually. They're probably around $35 each. Annual media exchange costs about $400 per year. This is an expensive filter. Media is also expensive. However, if you want a "military" filter and quality and reliability are paramount, then this is definitely a good choice. 4 solid stars for quality. -1 for the cost of replacing media.