Sounds like a good initial line of defence in combination with sprinklers if the fire spreads more.
Agreed, and if it's excellent for kitchen fires you could install a single system just for the kitchen. That would keep cost down while maximizing the benefit. I suspect that apartments wouldn't spring for a fully redundant system with their sprinklers, but might be willing to spend $1000 to cut the risk of the sprinklers going off in half. It could also be a good addition for homeowners and builders who are unlikely to install sprinklers at all, maybe enough to get a reduction in home insurance premiums.
