Awful system, doesn't work as promised. Just feel ripped off I have no idea how they have such a high rating. Do not sign up to this company. The contracts are terrible and all the lovely discounts they promise you disappear after a short period. The back up service seems good but doesn't work. Have now been waiting a week for them to answer on a logged fault with one of the phones not working and they still haven't responded. Please read your contract and do not trust the lying sales people when they hover over you and make you sign there and then without the option to read it all through properly. My fault for being to trusting. Bloody expensive lesson learnt and counting down the time until we can get rid of them.