I always love a good episode focusing on Mr. Burns. Unfortunately, this wasn't one of the better ones. I liked Burns getting ragdolled around in the prison, but the rest of it just seemed somewhat off. The Power Plant crew didn't seem to have the funny this week, either.
And the B-plot with Bart, Lisa, and ants didn't work for me either. Although I got a good chuckle out of Bart putting a Pop Tart in the ant farm.
According to IMDb.com, it was good but not good enough. And "the failure of the film to generate a profit would likely result in the end of the relationship between DreamWorks Animation and Aardman Animations"