Took a serious hit on Saturday, lost the cable modem ($70), one computer motherboard ($$$), CO2 detector in the basement ($40), and it looks like the almost-new Hunter irrigation system controller is fried. Trying to avoid this happening again. I keep hearing about these whole-house devices you put next to or inside your service panel, the electrician that just wired up the Habitat duplex I'm building installed them too. Are they worth it? Do they work? I see them range in price of $40 to north of $200. Thing is, the modem and computer were unplugged at the time, so they got whacked thru the cable. No way to protect against that other than to also pull the cable off from the wall before the storm.