I think this is an essential purchase for you if you, like me, use your Xbox One as a media centre as well as a gaming console. Honestly, I found it jarring to use the controllers while watching films or TV shows; so this has solved that problem.
Some of the pros: 1) It is always on, so unlike the controller, you don't have to wait a few seconds to start using it. 2) It uses some sort of RF, so you do not need to pair it with your console. All you need to do is insert the batteries and you're good to go. 3) It has a heck of a lot more functionality than the official remote. I found that playing very simple games are *possible* with this remote, though I would not recommend it!
Cons: 1) The directional buttons especially don't have a nice tactile feel, which is disappointing. 2) Button equivalents for the triggers and LB/RB are not on the remote.
All in all, a nice additional controller for your Xbox One.