I have a whole-house surge protector in my breaker box and a plug-in
protector for my computer equipment. I was glad I had the plug-in unit
a few years ago when a surge during an ice storm wiped out my tv and my
stereo but not my computer equipment.

Somebody in another group keeps saying the numbers prove whole-house
protectors are important and all plug-in protectors are worthless.

I don't have information on the circuitry in various models of plug-in
protectors or figures on what protection they provide. Without
information I don't know what protection I would get for the price of a
given protector. Where can I find out more?