I bought several of these when a retail chain was clearancing them for $2.99. One of the employees asked me just how many Segas did I have? I replied that you can use them for anything, not just Sega! All of the other power strips they had were twenty bucks or more. And it's true, back then there were no good power strips for multiple power supplies like the Genesis uses. They were all made with the outlets close together so that one power brick would block several of them.
I did have one of these fail. A friend had brought over an entire computer system and lacking enough outlets, we plugged the computer, monitor, and scanner/printer into the Sega strip. In a very short amount of time, it blew out and tripped the breaker for the house. Not only was the fuse blown on the Sega strip, it was completely fried. I guess they are not rated for that kind of power. I've never had any trouble with the one that I use for my Genesis/32X/SegaCD combo, though.