ZeroSurge is not a conditioner AFAIR, and there were some clones under other brand names. (Non-MOV). I use it to power my vintage QUAD loudspeaker, which requires voltage (a lot) to be on for 24+hours. I never unpowered it.
I don't like those plasticy cheap surge strips. The power strip I bought years ago (NAIM promoted) had no on/off switch. It is currently in use after a transformer that powers a pair of ancient mono tube amps designed for Britain. Doubt it is even a surge protector--just a high quality outlet box (with removable cord).