From a comedy standpoint, I enjoyed this episode. It didn't make much sense for Jim, Pam, Nellie, and Darrell (and Phyllis, though she had nothing to do) to spend all that time on such an elaborate prank with no planning, but the result were really enjoyable. And the Oscar/Kevin story really highlighted how badly they write Kevin and how much of an ass Oscar is really being, but watching Kevin struggle was funny.
Money problems plague Andy's family. Meanwhile, Dwight guests on a local radio show, so the staffers harass him with outrageous phone calls; and Kevin unearths a big secret about Oscar.
The Andy/Erin thing was more problematic. If I still liked him, the story would have been a lot more interesting, but as it is, it's only interesting in light of Erin's growing disillusionment with Andy.