I had bought the system for a two-week vacation and when I came back, the device showed only a steady light instead of alternating pattern. - Annoying: simply use ripe for a ton.
Also annoying: I do not even know how long the device has worked. - Is it failed early or at the end of 2 weeks.
But as it has ever time pattern shown, it gets at least a second point.
Too bad I had expected 2 weeks vacation are not a problem.