I am fairly satisfied with the pure enrichment tabletop air filter. For me, I live in a single-student dorm with my cat. I needed an air filter to keep out allergens and smells from my small space. This tabletop air filter is perfect for me. It’s the perfect size to fit near my cat’s litter box. I have it running 24/7 but when I turn it off, I can tell a difference. There wouldn’t be anything I would change about this product except perhaps work on improving and quality of air filtration. Yet you could make that a different product to keep this product economical and suitable for University students like me or others. This current filter has lasted me about 2-3 months and I think I could use it for longer but I think it’s time to change it.