Quoted from flecom:sure AC/DC is hard to score well if you don't know what you are doing, but if you just want to play the game it makes it obvious when you select a song, hey shoot here... WOZ doesn't do that, it expects you to read all this stuff on the LCD and such, and I don't want to do that... at all.. I just want to play the game... not necessarily be good at it, just shoot some stuff, maybe qualify a multiball...
It turns out that as a first approximation you really can shoot more-or-less anything on the playfield and something will happen on WOz. Maybe not the best thing, but A thing. This is unlike AC/DC or ST, where if you're not shooting the right thing then you get pity-party points. At the start of the game, the only things you can shoot on Wizard of Oz that doesn't accomplish anything are the spinner on the far left (which isn't lit) and under the upper flipper on the right (which also isn't lit, and when it does do something lights up very obviously). Literally every other playfield element at game start gives you progress towards something in the game.
In terms of conveyance, the rescue playfield leans on you knowing a little bit about the story of the wizard of oz in order to understand what's going on---the parts of the game that have to go into the rescue mode are clear if you understand the story. Also, if you could play the upper playfield for 10 minutes the game was set up terribly, as I think that the mini playfield is pretty hard on most Wizards of Oz.