I don't usually fall for infomercial products, but when I saw this on tv, I wanted it! I purchased it at Walmart for $14.99. It fits onto any hair dryer very easily (comes with attachment rings to adjust). Make sure you have it on there TIGHT or it will fall off. Trust me, LOL
Anyway, this thing actually works! I spray my hair with a heat-protective spray and, taking small sections at a time, insert into the air curler, blast it with medium-high heat for a few seconds (moving up and down the length of the hair to get it all) and then finish with a blast of cool air. It creates beautiful tendril curls that are just lovely! Now, it would be just as easy to quickly dry your hair and then use a curling iron, but this thing is actually fun to use and saves a step with the dryer. The only negative thing I can say about this is that it gets REALLY hot to the touch if you've been using it for a while. That's the only negative. I think this would be a great gift for anyone with medium-long hair. I've watched videos on Youtube and, unfortunately, it doesn't seem to be effective on hair that is above the shoulders. All in all, I really like it and would definitely recommend it!