When a friend suggested this product to me, I was a bit hesitant at how well it would work but when I ended up purchasing one and using it for the first time, I was quite SURPRISED! Because I use an AC Adapter (which I *highly* recommend), the airflow was much stronger. The cool air helped lower my body temperature and I felt like I was sitting next to an AC. Now, it doesn't replace an AC but I feel that it is better than a fan! I will also use this to dry my nails because sometimes my nail dryer blows *warm* air on summer.