I have own three of these. It is great for using a computer with your TV. You can sit in a chair 15' away from your computer and play a game or watch movies. Add a M$ or Logitech opital wireless mouse and you never have to leave your couch.
Anther great aspect of this keyboard is that you can two of them side-by-side and they won't interfer with each other. Each keyboard syncs to each hub offering the ability to have multiple kewyboards in close promiity.
The two batteries that it comes with will last you 3-6 months of constant use. With good batteries, the keyboard will type away for years w/o need for new ones.
If their is a weakness in this keyboard it is if you spill something inside, it done. You will have to buy a new one.