We do! Well... 2 Actually. We have the cheap 80 buck one and then the 200 buck one with the touchscreen up the top (we use this one daily)
Yeah they are really good... you just need a PC with internet, load up the driver, and add your devices!
Our linked devices are Foxtel, DVD, VCR, XBox, TV, Surround Sound, HP Laptop.. you can even do your heaters/air con units (if they are newish)
They are very handy, although they do take a bit of getting used to... they are as simply as they make them out to be.
It took me about a week to get the hang of using it. But its much more easier using one not 5! No remote boat needed for our coffee table!
Oh and with Foxtel, when using the uni remote, it seems to be a bit delayed when pressing buttons, and its a bit harder to link to the remote to the foxtel box than any other device... thats the only thing I can fault it for.