I think it's a great idea!
I took the easy way out myself by "renting" one from my power company. They mount it between the meter and the house. It costs me $5.99 a month but includes replacement of any appliances if they're damaged by surge. From an insurance perspective, that a good deal as home insurances always have deductibles.
I suspect it may suppress online X10 power line signals from leaving or entering the house, a good thing in my opinion, but I haven't tested that theory.