Haunted55 didn't you say it the electricity went off you could hook it up to a car battery also. That's a real plus if you live where the electricity usually fails in a storm.
FBC is right. Really depends on if it is going to be a hobby or serious, type of eggs you plan to hatch, and how many. I had a Styrofoam incubator worked great for chickens but was a total failure with pea eggs, yet another gentleman uses same set up and is very successful.
If you are just...