They don't work nearly as well as the marketing says they do. They might save your equipment from a lightning strike a medium distance away, by absorbing the remnants of the surge that get to you - only once or twice before the protector is dead! - they will not save your equipment from anything that lasts longer than that.
Most surge protectors are one-shot. They may not make this clear in the marketing.
They don't work nearly as well as the marketing says they do. They might save your equipment from a lightning strike a medium distance away, by absorbing the remnants of the surge that get to you - only once or twice before the protector is dead! - they will not save your equipment from anything that lasts longer than that.