Just a nitpick, I suppose, but I found it really disturbing that Bart has a flat screen TV and a DVD player. I just think "The Simpsons" should always be a product of the 90s and seeing them with modern technology feels wrong. I think I saw Homer with a cell phone that looks like a blackberry once and that bothered me too. Them parodying "Saw" made me sad as well, and not just because I think that franchise is a lame farce.
This was one of the first episodes in a long time that I thought was decent enough to be watchable from start to finish. Yes, it was a little more similar to a classic episode than most of their recent output, but still very far from a return to form. I still think they've outstayed their welcome and the show should have ended in the 90s where it belongs, but this was one of the least offensive modern Simpsons episodes, so huzzah.