I had no idea what this was. This book was bought for me as a gift because of the civil war painting on the cover and the gifter and I didn't bother to read anything on the back. Anyway...
The comparisons to Vonnegut are pretty accurate, only Saunders is darker and more offensive. As someone who used to worship Vonnegut a little too much, I think they are also unfair. Saunders is his own writer and though Vonnegut is the easiest comparison, I think it's safe to say that he is original enough - and definitely funny enough - that we shouldn't worry if he's carrying on in Vonnegut's shadow.
Some of these stories are just absurd and hilarious, but some of them are so poignant behind their absurdity that I almost felt bad for laughing.
Probably the best thing I can say for the collection is that it makes me want to read more of his work.