Opening: I liked it very much, although I think they went a bit too far with all the violence. 4/5, still.
Reaper Madness: I thought this was pretty good, and I think it was done better than the Family Guy episode 'Death is a Bitch', although they are both very similair. 4/5.
Frinkenstein: This was the weakest out of the three segments, I didn't think it was that great. 2/5.
Stop the World, I Want to Goof Off One of the best THOH segments there has been for a while, although this didn't really have a Halloween feel to it. Loved the ending.
Total: 4/5. The best Halloween episode there has been for the past couple of seasons, although it still didn't seem very Halloweeny.