I have just bought and installed Vodafone Sure Signal (Click Here).

Which is an interesting concept, basically Vodafone admit signal coverage is crap where you live and then charge you £50 for the priviledge of getting a fantastic 3G signal.

That aside, it is a nice small box, simple to set-up and does give you full signal strength in your home with 3G data speeds at full rate thanks to it going through your broadband to fetch the data.

Overall I recommend it.