Ah, thanks for correcting me. I didn't have time to go through it yet.

https://github.com/facebook/KVOController#usage

By controller does the readme refer to the KVOController instance? I assume this is a property on the class that uses it, and once the class gets dealloced, its observer also get dealloced? FBKVOController

Hmm... I think this is a much better idea! Much cleaner than what I current got going, but then again we don't offer the same api. Thanks for correcting me!