I know the best kind are the ones which would be wired into the system, but saw this today and wondered if it would be any good. Is this a "better than nothing" or "you get what you pay for" situation...
I wonder how many people have actually had their surge protectors prevent anything except odd wiring.
I was at an State Park where my protector showed that on one side of the road the park power was wired wrong; the other side showed okay. Based on the occupancy this did not seem to pose a problem. I chose the properly wired side because I had a choice of spots.
Also how many Joules is enough? Pick a number and why not twice that amount or half that amount?