I downloaded the free app about 5 days ago and so far I have been able to play without feeling the need to make in app purchases. Naturally, you can progress faster if you do purchase stuff, just like TN.
I also haven't tried to add friends yet and fear that you might be forced to do it through FaceBook, which I refuse to do.
However, it's a cute simulation game with nice graphics and clearly outlined quests to achieve so you don't flounder around wondering what to do next. Looks like it has a lot of potential....more than others I've downloaded to get free MB and deleted immediately.
Interested in feedback from others who have tried it.