Pros: - Price

Cons: - Noise reduction makes a loud, cracking pop when adjusting the head band - Noise reduction makes a subsonic (~7Hz) flutter when something touches the headphones, such as a pillow

Overall Review: The noise reduction is a bit under-engineered, and has a few unpleasant glitches as noted in "Cons." The build quality is good, and I generally like Anker products a lot. Knowing what I know now, I would have paid a bit more for a better pair of headphones.