I just bought an older (1948) home. The previous owners were unable to provide information on the electrical system. All I know is that it has been updated since it was built (breaker box looks newer, no knob and tube wiring that I can see). But, I've seen some less than desirable features in the system, such as many three-prong outlets with open grounds, no GFCI outlets in the kitchen or bathroom, mini-breakers in the box, range hood wired very sloppy (shocked me when I removed it). Is it worth having an electrician come in an inspect and upgrade the system where necessary? I know people lived for many years on two-wire electrical, but I don't feel safe plugging my AC or TV into an outlet with no equipment ground.