If you have expensive gadgets so it is worth the cost of a little extra to protect them. Has not yet had to see what it can do in a thunderstorm, but it protects my expensive gaming computer and display, and the router, and ADSL modem.
Works really well. Has protected the many lightning storm. Have unfortunately not had any equipment plugged into this which has led to some things broken when the thunder had been there. Have now complemented with more protection.