I've had Greystone Security for about 5 years now, although it is now controlled by EMC Security. Same people, same good service. They do finance your installation and there is no contract to sign for the monitoring service. Still the same $16.95 for monitoring, just like it was when I signed up. Recently, I had the land line taken out and a cellular device installed on my system, which has worked great so far. It even allows me to arm, disarm and check the status through my IPhone.