It's just I'm usually the one to say "So and so captured my thoughts perfectly, but put them much more eloquently than I ever could."
That's about the extent of my knowledge as well.
It's a site that offers, for a small monthly fee, the service of streaming hundreds of tv shows and movies to your computer as well as many other device; including all major game consoles as well as ipads and DVRs. For Yanks like myself there is also the option of adding a second monthly fee to have DVDs sent to our homes as well.
I would say it's worth it, though their tendency to put a thing up for streaming and then limit it to DVDs a month or so later is annoying. Probably much more so for people who don't have that option and much less so for people who don't share there account with three other people.