I have just ordered my fourth of thesis switches. When They Work, They are fast and low power. Unfortunately, if you have to electrical (thunder) storm They may appear to work afterwards but begin to reshuffle your IP addresses. Suddenly your network sometimes works and sometimes for no apparent reason it does not. It Is Only When you start monitoring your IP addresses did you notice something That is not right. Since I have several switches in my network, I was reduced to swapping units out until things worked again. In each case it was this switch. I have just bought another Because When They Work They are very good and now that I know They can appear to be ok When They Are Not I will not waste so much time locating the problem the next time.