The system is very good. Many times the speed exceeds the quoted 20 mbps and we have only found it slow on few occasions. The reason for the Poor rating is purely that we have had a fault on the system since installation (although it does work). The router flashes an error and the reporting system tells us there is an error with the power of the system. Despite being told 5 times that a new router would be posted, 4 months on we are still waiting and although in the early days we had replies, now we do not even get a reply to the many many emails we have sent.