The Unbeatable Squirrel Girl Beats Up the Marvel Universe

As expected, excellent.
In spite of the "appropriate for Squirrel Girl neophytes" label, I'd recommend reading at least the first dozen issues before reading this.
A very good story, with an interesting twist on the typical clone story.
The pacing bugged me just a little - for a very small period in the middle, I thought it dragged, but the payoff was really there. Between that and some art issues (earrings appearing and disappearing on the clones, making it harder to tell which was doing what), it lost a star, but it was a tough choice. I'd consider it a 4.5, really.