Purchased after a recommendation from my close friend who was having same kind of allergy and he has used it. He got too much relief after using it for 2 weeks. I also thought to try at least as was taking medicine (anti allergic tablet one tab/day) for almost 10 Years (since 2012). That's the only reason I moved out to Pune from Bangalore but still didn't see the improvement.
Observation: I could see the difference after using it for 2-3 days and I didn't feel to take medicine as I used it my bedroom which is my workplace as well in day time (due to Work from Home), so spend my most of the time in that room. Even I am staying at 12th Floor but the dust which is not visible at all with naked eyes, absorbed by this "Dirt Eater cum Air Filter" you can see the images after usage of 2 weeks.
Pocket friendly and most effective. This is a must have product if you have dust or pollution allergy or looking for Pure Air where you spent most of your time.
Now it's installed in my all rooms. I kept my doors & windows close for best result.
Improvement in health: As mentioned earlier used to take medicines (almost every day), After using this I took medicine two times in last two week (it happened because I had to travel outside both the times).