Well made, works well
Bought this for the formaldehyde filtering capability, to help remove the smell from new carpets. It worked better than expected! The filter you get with the unit is the HEPA filter, so you have to buy that filter additional. Well made product - does a great job. I use it on high in the bedroom for a while in the evening, and then change it to night mode, which is a lot quieter. Moves quite a bit of air on full tilt. You can use without the app, including dimming of turning off the front display. If you use it with the app, you can schedule then to turn it on/off.