I ordered this earpiece after having owned several "cheap and cheerful", all of which died after anything from a few weeks to a few months.
When it was delivered it's quality became apparent, from the packaging to the feel of earpiece it is very well made. It is compact, and stylish. It looks good when worn.
Inside the packaging there are a number of different sized interchangeable rubber earbuds, in 2 different shapes/styles, along with a very slim "ear hook", which pushes into a small hole on the side of the earpiece. Apparently the earpiece can be worn without the hook, but I would not even try it, as it would fall out of my ear, although other people's ears may well be different to mine. After trying a couple of the earbuds I settled for the mid sized one without the loop on it, and it fits just fine. I can wear this earpiece for 9 hours straight through,it stays put, and is comfortable for the entire time.
It was very straight forward to pair with my phone, and connects quickly every time I switch it on, first time, every time.
The battery life is awesome. I use this for 9-10 hours per day, and used it for 8 days without charging it to see how long it would last. It didn't run out even then! When I charged it, it took just over 1 hour, amazing!
As for the earpiece in use, all I can say is, brilliant! When I talk to people when driving (I drive lorries, not the quietest environment) they cannot believe I am driving, as the noise canceling really does cancel out all of the background noise, even if I am driving with the window open!! It is loud enough for me to hear the conversation without holding the earpiece against my ear, or pushing it in deeper into my ear canal. The noise canceling can be turned off, and I did this once, to show the effect to the person on the other end of the phone, and they did confirm it makes a huge difference. I can't see any other reason to disable this feature, unless of course you are using it in a totally quiet environment.
The only downside I can find with this earpiece is that you have to be a little careful if you do need to push it on to your ear during talking, as there is a chance of cutting off the person on the other end. The reason for this is that there is no "answer button" on the unit, you just push the casing and that's it. So you need to be a bit careful, but you soon get used to that. A VERY minor point.
In summary, I would definitely recommend this to anyone thinking of getting a noise cancelling headset.