If anyone is ever considering buying one of these, think about a Space War instead, same basic game, but better, MUCH CHEAPER and with a larger monitor as well.
Computer Space is the kind of game owned by the guys who have a $50,000 collection that they NEVER play.
On the plus side for it though, it is one of those games that is ALWAYS nice. Most of them didn't see a lot of location time, and I have only ever heard of one of them being converted.