I'm not a fan of how you can get multiple cakes. It seemed to me like it should have been a one-time purchase. Even though you can get multiple diamonds, those are $100 each, so...
For all those who are having trouble with getting 4 star reviews for 4 days: You can get rid of everything. No customers counts towards it. Just make sure your market has no family working it
Anybody remember SimTower? This is basically a modernized version of it, with just as entertaining (if not, more) gameplay. Of course, you can't beat those tiny little black figures that are supposed to be people.