The Whole "Alternative universe" thing is probably the number one thing that every science fiction show has a stab at and is the most out there thing that they all try to do something with. It was only a matter of time till "Futurama" tried it out so here it finally is in season 4.
This episodes alot of fun if not as hilarious as some of the earlier or newer episodes. Most of the laughs come from Bender, again living it up with another version of himself.
As I wrote above, the whole other universe thing has been done lots of times before, but its the first time this show has used the idea, and they get some cool if predictable use out of it.