The later stories acheive such a transparency you can forget how funny they are. Michaels is a master of form. They are narrated in a natural, subdued manner, unlike the glossy, journalistic style we get from some of our other first tier writers. The differentiated narrative strands merge together gradually as the story progresses.
Thematically, Michaels' stories are interesting because they are often set on the cusp of the sexual revolution, and there is much confusion about gender roles in relationships. All in all, one of the best books I've read in awhile.