kmann, I'd pass on the Xium and get the Channelmaster 4248. Heck, if you live close enough to the broadcast towers, you may even be able to get by with the Radioshack double bowtie indoor UHF antenna. Either way, you'll probably get much better results than with this snake oil Xium product.
EDIT: Ok, this is a different Xium product than the (poor) ones I've seen before. What the hell, if they guarantee you can return it, you might as well try it out. I think it's just their cylindrical antenna mounted on top of a "dish-looking" reflector. Could be interesting to compare its performance with something reputable like a Channelmaster 4248.
Free over the air HDTV + Tivo HD + Netflix for Blu-ray and streaming = Bliss