These are amazing, and Bose is excellent! I purchased these headphones for their noise-cancellation abilities, doctors orders. I am depressed and using these earphones helps not get easily distracted.
The built-in microphone is impressive and the noise cancellation is great to forget the world outside. Battery life is extremely good. An added feature is that the Bluetooth feature will allow you to connect to and hear audio from two sources at the same time. This is great if you want to connect to your iPhone and iPad at the same time.
It was a great Christmas pressie, and I couldn't be happier.