We was recommended QSX Security by a work colleage who knows the owner. From the very detailed security assessment, detailed installation quote and plan to the finished Job, totally professional. QSX was not the cheapest quote we received, but felt it offered the best value for money as the system was Grade-2, fully hard wired, included smoke detection, SMS and Keyring Fobs to simply arm the system. Very pleased and would highly recommend. Mr S. M..n - Cambridge.