My family and I suffer from allergies and asthma. I live in Houston, TX and with all the extreme weather changes, mold, pollen and other air pollutants out here, it's difficult to get good air quality. I've tried other air purifiers and changing, cleaning or remembering to replace the filter every 30 days was not worth the air quality they provided. Molekule has significanlty improved the air quality in our home and it even removes lingering odors as well. I bought two Molekule units for my home and after the first couple of hours, you can tell the difference right away. I am extremely impressed with how quickly the units worked to clean the air in our home. My sister came to visit and she notice the difference in the air quality right away. The unit is very user friendly and easy to setup. I highly recommend Molekule, it is worth the price tag!