My major compliant about these earbuds is the astonishingly infuriating vibration feature on the left arm of the neck band

I couldn't believe all of the available features this unit has

My favorite feature is the buzzing that you get when you receive a phone call, so you don't have to leave the ear buds in your ears at all times

The noise cancellation is a nifty feature

Most of the time, though, this action will instead cause my phone to dial the last number I called (which is not welcome and rarely a useful feature at 4:30 a.m.

Active noise cancelling technology cancels the low frequency noise by up to 95% -- great feature.

Excelent features and quality

I tried the noise canceling feature in my car the the "roar" of the a/c going full blast and was pleasantly surprised with the ability of these headphones to create a quiet environment

Different ear piece sizes was a good feature though.

Very frustrated as they are basically brand new and have only charged the item two maybe three times till this happened.

Active noise canceling is definitely not as good as on my old Audio Technica ATH-ANC23 headphones, and the volume doesn't go up that high to compensate either.

They are confortable to wear, and if you put them inside the shirt people around won`t even notice