4-4.5.

Solid Stern pin, not up there with the big guns of Spiderman, Simpsons, but the limited numbers in Aus can push up the price a bit.

Mini playfield is a neat little toy (and essentially the main toy of the game) but can be frustrating after a while due to the poor ball physics (if it has enough velocity, a lot of the time the lightweight mini ball will bounce over the flippers and straight down the guts.) You really have to employ a "catch and grab" play style for the mini playfield to successfully get all the mini pf ramps/loops.

Plenty of farting (Fart Multiball) and vomiting (IPECAC contest) noises in the audio if that is your bag. The modes and multiballs are stackable so listening to a machine simultaneously vomit and fart its way through a multiball sequence certainly gets the attention of everyone within earshot. 

Clam shot behind the pop bumpers seems a bit of a design afterthought and nearly always gives fairly worthless awards.

The pop up ball save disc between the flippers messes up your gameplay in my opinion and should have been left out, (I guess they were aiming at a newbie player market.)

If you are a fan of the show that will probably carry some influence as your enjoyment factor of the pin.