I think this is decent collection to start with SF short stories, since you get a good overview of some big name authors and their styles. I don't think this is their best work, but it's a good representation of modern shorter works in the genre. There is enough of a variety in themes and tone as well. 
This collection was good but none of the stories really blew me away, unfortunately. Plus, a lot of them had a more contemporary feel to them, which just isn't my preference.