Well I am no expert on this but living in florida the lightning capital.We use surge arrestors at the panel and surge suppressors downstream.I took a hit last month with a arrestor on my panel guess it went bad but it wiped out my phones my low voltage lighting my secruity system tripped my 200 amp main but it did'nt get my cpu.I use a true sine wave ups that I plug into a suppresors and then a plug it into a gfci.The gfci seems too go bad but that is it.Anyway the way I see it the more the merrier.It is also nice to get one with a indicator.I don't think they can handle too many spikes.
