Purchasing the hardware is legal, however viewing illegally distributed content is illegal. Some, people say its a legal grey area because you are not downloading the content, you are merely streaming it. However, the argument has a hole in it, because the content was distributed illegally, and therefore viewed without proper consent. So, this still makes illegal.
What I would suggest is purchasing an Apple TV, instead of the above. With Apple TV and a subscription to Netflix, you can use a service like »
tunlr.net to gain access to Netflix USA. This will give you access to many movies and shows. This option affordable, and easy to implement. No headaches!