I was planning on leaving a detailed analysis of the effect of IAP for a later post, but you're right that some people didn't like it. Especially in the Facebook group at one point there was almost a small-scale riot from people feeding off each other's negative comments. But as usual, that's just a vocal minority.
I had to intervene by explaining why I was charging for extra content (http://www.facebook.com/topic.php?topic=10677&uid=748971...) and I think that once people realized it was just me and not some faceless corporation, they were much cooler about it.
So my comment about "people loved it" referred to the fact that I got tons of positive feedback and the fact that IAP sold very well.
Frankly, I knew some people wouldn't like me moving in that direction (especially if you're used to the model of free updates for life), but I'm surprised that I didn't ruffle more feathers and most people took it really well.
Also interestingly, I think this has gotten people who had cracked versions of Flower Garden to purchase in-game items, so that probably helped too. But unfortunately I don't have a really accurate way of measuring that (I'll try for my next post).