Great theme integration, unique playfield, great toy in the lamp, unique ball effects with the Genie magnet and the outlane cages, great sounds and art. Super all-around package.
I think a lot of people dump on it because they get to the wiz mode easier than on other games (by wishing away tale after tale) so they've "beaten" the game. ToTAN can be set up tough for shorter ball times which is necessary imo.
Only changes I'd make are software related. The final battle should be shots to the Genie, not the gold symbols, you should need to collect the ruby to light "collect jewel" on the wishes, otherwise random choices here as other have mentioned, and I'd toughen some of the tales by requiring a few more shots on some of them. Nonetheless, solid title by Jpop and a 90's classic, as is proven by the price it commands.