I get real particular when it comes to these things. A number of years ago I got hit with a power surge, and it wiped out a good chunk of my AV and computing devices. Taking apart the surge protector that was supposed to be keeping my gear safe revealed almost no internal components. Getting the manufacturer to replace the gear it failed to protect was an exercise in sheer frustration too.
Now I won’t buy a surge protector or line conditioner without being able to see what’s in it.
For example, the Furman RP-8: (Discontinued, I think?)
a $105 rack mount Furman M-8X2:
Versus an $80 Isobar IB8RM:
A thermal fuse, MOVs big enough you can’t floss your teeth with them, quality chokes and inductors… Yeah, I’ll take the Tripp Lite, thanks.
I’m not trying to say ALL Furman stuff is canine feces, but… meh.