Really difficult to be positive about the experience. The install took four attempts. Attempt 1: No show, claimed the install couldn't go ahead as a difficultly with another domestic install. Was informed after install should have commenced. Attempt 2: Engineer wasn't informed of the install and didn't turn up. Was then promised an upgraded (lockable) unit as compensation. Attempt 3: Engineer showed up and informed us that the install couldn't go ahead as the power circuit we'd had installed wasn't large enough. Attempt 4: A more experienced engineer turned up and installed the originally ordered unit (i.e. the non-lockable variant) on the power circuit we'd installed. Unit works fine however.