Yes, promises are great. It would be nice to have a function on a promise that returns a regular callback which you can pass to functions that only know about callbacks.

Also, if you are using promises for getter functions, you'll have to store those promises somewhere, so that next time you don't load them again. Basically "getting" a resource involves caching, promises, and maybe even throttling. So its ideal implementation is not really just a promise.

Check this out: http://platform.qbix.com/guide/patterns