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...
don't cheap out with the $99 specials, get a MULTI-FUNCTION surge protector. $250 and up. as has been said, you want/need more than simple protection from surges. and you CAN get suitable ones in a portable. bumpy