First of all, I have already own a Audio Technica ATH-ANC7b and like it a lot. Sometimes when I only travel in a shorter trip, I want to try to get one is easier to carry and easily to store in my cloth pocket. I happened to see Staples have the Audio Technica QuietPoint Active Noise-Cancelling In-Ear Headphones ATH-ANC23 on sales for half the price. For about 40 bucks, I bought one. The online review seems to relatively good so I took the chance. I used it once in my last trip. The noise cancelation is enough for me although I still like my ATH-ANC7b better. The bad thing is that the ear plug can easily come off. The external battery box is something get into the way. Other than that, it is definitely worth the 40 buck. No regret.