I've been using one for the best part of a year (since it first came out). It works so long as you're not expecting Dolby Digital sound on Freeview (Freeview HD uses HE-AAC rather than AAC-LC for encoding Dolby Digital and since WIndows doesn't currently support this so all you get is two channel PCM). if you want Dolby then you'd need a dish and DVB-S2 card, but WIndows doesn't properly support DVB-S2 either so this takes some trickery, but it can be made to work.
The original 32 bit junkie now snorting pure 64. Sky Broadband, Wired, Wireless, VoIP, 2 Macs, 2.5 Hackintoshes, 3.5 PCs, iPhone, OS X, Windows XP, Windows 7, Ubuntu.
Rehab is for quitters