Taken by itself, I could see how this collection of stories could be confusing or unappealing. But I really loved the Mars trilogy, so I found it really enjoyable to be able to revisit Mars for a little while. I wouldn't necessarily recommend this for anyone who hasn't read the whole trilogy, but for those who have, it's a real treat.
Sure, it's kind of scattered and random, but if you made it all the way through the Mars trilogy, you'll feel right at home with this book.
I especially enjoyed "Arthur Sternbach Brings the Curveball to Mars" for some reason.