I agree whole-heartedly with Mezmo, it all depends on what your electrical situation is. I live in NYC, too. The first block to ever have electricity is in NYC. Once wiring is in place, there has to be a really good reason to spend the money required to go back and dig it up or rip it out. Much of this city was wired at a time when a couple light bulbs and a radio were the extent of electrical appliances; people had "ice boxes", not refrigerators. Well, those circuits are not loaded down with refrigerators, air conditioners, etc., and the refrigerator in the neighbors' apartment can make your lights dim. Power conditioners are almost a necessity. My building was built in 1937, and has not been rewired since. I grew up in the suburbs where everything was wired in the 1960s, however. Line conditioners there might be considered over-kill.
