Copy and Paste
Major points to Pulido for his artwork here; his style works great with Sandman and it was a joy to look at. While I'm at it, I'd like to give mention to Rivera as well for two awesome covers (referring to this and the previous issue). There's great imagery all over this comic.
Story-wise, we get the payoff of all of the previous issue's setup here, and what great payoff it is. As you can see from the cover, Marko's learned to spread his consciousness across multiple copies of himself. It leads to a lot of great moments that I don't want to spoil here, but I can say that we get a great look at Marko and what makes him tick. This issue really ups my opinion of Sandman.
There's quite a few funny moments in this issue as well, such as Spidey's comment on "darker, grittier, more morally ambiguous" superheros. There's also quite a few less-than-cheery moments as well. There's no happy ending here. It's a good ending, though.
This was a great issue and totally worth the setup heavy lead-in.