Frankenweenie is a gorgeous looking film. If you are going to see it, see it in 3-D.
(Keep in mind here that I am of the firm opinion that before Frankenweenie there were exactly 6 films worth seeing in 3-D.)
The reason that you may not want to see the film is that like The Wizard of Oz's Tin Man it has a ticking clock where it's heart should be. Originality and character development are sacrificed on the altar of continuous homages.
It's entirely possible that the reason that I disliked the film is that I have seen too many of the films that Tim Burton likes, (or that I'm crazy) so it might be great for kids - who presumably haven't seen all the Universal Monster Movies (and the Godzilla series and the Gamera series and Willard/Ben and etc...)
In terms of the 3D, for animated films only Coraline tops it.
The other 5 on my list of worth paying to see in 3D in no particular order are: Cameron's Avatar Scorcese's Hugo Scott's Prometheus Herzog's Cave of Forgotten Dreams Wender's Pina
Heller really sucked that episode. If that was all he was gonna be used for he should've stayed with his lame sitcom instead. How many times did Jack save his life and Audrey's life last year? And this is how he gets paid back.