These are an exceptionally competent pair of headphones.
Sound quality - As you'd expect at this price, excellent all the way from bass up to tweeter territory.
Noise cancelling - While it certainly doesn't eliminate all of the background noise, using the noise cancelling feature while vacuuming makes a huge difference, probably eliminating two-thirds of the noise from the vacuum cleaner. The large over-ear design of the phones cuts out quite a lot of the background noise anyway.
Connectivity - Connected easily to my Android phone via Bluetooth, and experienced no dropped connection or even faltering connection until I was more than 20 or so feet away from the phone. The wired connection (cable included) worked perfectly with my desktop PC.
Ease of use - Only a few buttons, which are easy to reach (even while wearing the 'phones); nothing complicated here - I could even use the double- and triple-press of the main button while listening to my android to go to the next or previous track.
Comfort - I feel I could wear these for hours. They seem less prone to causing 'sweaty ears syndrome' than many similar headphones.
Battery Life - I've not run them down during a long single use or multiple short uses, so it's more than adequate for my purposes.