aye its expensive.
the RA came with a tracker unit already installed so I had to pay a fee to register it with my details and then an annual fee to subscribe, about £120 odd from what I remember.
wanted to get it serviced and they charged me another £80 for sending a chap out to do it.
have had problems in the past with their finance dept,
it seems that the Tracker company have outsourced billing and taking payment to a third party, how daft is that?!