I make no secret of being a big fan of Neal Ashers work and this collection of short works set in the Polity universe hasn't changed my opinion one bit. It's excellent. This collection sheds more light on some of the minor characters of the Polity novels, the Gabbleducks and Hooders, Geronamid, Erlin etc and adds more moments of drama and back-story to some and fleshes out the personas of others. There isn't a single weak story in this lot but if I was asked to pick the best, I'd go for "Softly spake the Gabbleduck" which was a claustrophobic chase story with a nicely packaged ending.
One quick note, and no fault of the Author, the longest story in the collection, "Alien Archeology" was also published in the recent "The Mammoth Book of Best New SF 21" anthology edited by Gardner Dozois, which effectively made a 1/4 of the book redundant for me.