Th reason this item is not very good is because its very flimsy and wireless iternet still needs alot of work before it can become the norm, reason is there are lots of invisible waves all around us which can interfere with the wireless connection for example microwaves and sound waves from radios and big vehicles going past your house making it vibrate a personal experience of mine.
Xbox live is not good enough to support wireless im on wired and i get disconnected from games and partys because of live my internet on the pc works flawlessly so i know in my mind that its not my internet connection.
Also the price of this item is not very cheap either it retails at £39.99 and is not worth it since you will most likely have a router in your home for your computer you can buy a cat5 ethernet cable for about £6 depending on the length of cable you want also depends on the price. overall this isnt worth buying it is a waste of money just stick with wired internet it is more reliable than wireless always will be.