I'm glad they are admitting that the system has limitations. The worst being that it issues both false positive and negative alarms. Then it will be just like the fire alarm in a sleazy student residence!
I can't really see these things working for the general public, but they are good for trains, tunnels and bridges. As they said in the article, maybe it will encourage more preparation, or discussion of earthquake scenarios.
Here in Canada, we really need earthquake scenarios to save lives. Nobody knows what to expect, and everybody will be running around like headless chickens when it happens. An earthquake in Canada will be a "Katrina of the North".