Pretty uneven set of stories, but the good ones are very very good. I particularly liked Tower of Babylon, Stories of your life, Hell is the Absence of God and Liking What You See: A Documentary.

All of these give a definite impression of starting with a "what if.... X?" and running with it - sometimes at the cost of feeling like "concepts" rather than "stories with a plot and characters". Which is not necessarily a bad thing, mind you! some of the explored concepts are indeed very intriguing and/or fun!