Build some stuff with Reactive Cocoa before you jump on that bandwagon. It pollutes the stack of everything it touches and its not very useful unless you use it pervasively...

I agree completely. Its use case is highly specialized and all it does is make a bunch of code nicely split up into methods and crams it into fewer methods with a ton of blocks. Even the example of "before" and "after" on the github page shows that how complicated it makes things look.