*update 03/03/23 : intercom and locking system in stairwell malfunctioning, stuck on unlock, with a buzzing sound all night, called smartlox and they were there within the hour, reset the locking mechanism, and buzzing has stopped. Great service and super efficient. Cheers! Quick responses, great service at reasonable price, fitted a lock in our communal stair, and arranged spare keys for all the neighbours. Can’t fault the service. Would highly recommend.