Just like what others had said, the first three "Supertoy" stories are good, then the rest becomes rather irrelevant. Kubrick and Spielberg seem to have good taste, in mainly adopting the first story in the excellent movie A.I. It's worth buying the book just to read the first story.
To start off Aldiss apparently hates humanity, or at the very least human vanity and self-centeredness. He also seems to think that humankind will not grow out of these flaws, instead humanity will become more and more self-centered as time goes on, so be prepared for a future that is at the same time utopia and distopia...
Aldiss's writing style does seem to swing between brilliant and not so good, but there is enough brilliant to make up for the rest. III was particularly grim (the image of what humanity does to the inhabitants of Triton will stick with you), and "A Matter of Mathematics" could possibly be made into a decent screenplay. All told, "Supertoys..." is an incredible collection of eerily plausible sci-fi that just about everyone should read once, if not more. (if just to avoid turning the inhabitants of Jupiter's moon Europa into Campbell's Canned ET)
The sixteen short stories that follow are much, much worse. Most of them teeter on the edge between dramatic fiction and satire, so that they are neither interesting nor funny. Only “Apogee Again” contains any imaginative ideas and descriptions. Some of the stories, such as “A Whiter Mars” and “Cognitive Ability and the Light Bulb”, are not really stories at all; they are summary descriptions of how society will evolve into a vegetarian, religion-less utopia. Others, such as “Dark Society” and “Steppenpferd”, start out promising but leave the reader with lady-or-the-tiger endings, without any resolution to the conflict.
Please, please don’t waste your money on this collection.