It sounds too good to be true. For $80 you get protection for all the electronics in your house? It might work, or it might not. I don't have the experience to say.
Whenever something sounds too good to be true, it usually is. I usually stay away from things like that, and most of the time I end up being right. Some times these things work as advertised and save you money. Sometimes they don't, and they end up costing you money.
Right now, I protect all my computers in my house with UPS's. I know UPS's work, but I'm spending a lot more money than $80 to do it the sure way. I'm currently using 7 or 8 UPS's to protect my computers and critical electronics. UPS's are expensive compared to surge protectors, and you have to maintain them with regular battery replacement.
And, the UPS's **** power so I pay every month to run them, but since I put all my electronics on them, I've had no hardware failures at all, and no outages during power bumps.
Maybe somebody here has first hand experience with the surge protectors and can help you.