[steveg]

Use their router - you can always change it over after the installer leaves, as long as (as has been said) your current router will handle 50Mb, i.e. is an "N" router.

As for the channels, the installer had to make a call (twice) whilst at my home to get this working, but it only took a couple of minutes and all was good.

Have a PC ready and booted up in the room where the modem and router are to be installed as there are some thing he/she will need to do to activate and test the system - also make sure you get the wireless USB key as you are entitled to it (I don't need it, at the moment, but may do in the future so made sure i got it.

Incidentally, you might like to be aware that if your connection at home to your computer/s if like mine, a wired connection, then you can and likely will get 50Mb speeds. If however, you use a wireless connection, then expect speeds of around 30Mb, still good, but not AS good.....