We use bluebird. With BLUEBIRD_DEBUG=1 we get amazing long stack traces that span across events, and they got even better (cleaner, more accurate) post bluebird

We use bluebird. With BLUEBIRD_DEBUG=1 we get amazing long stack traces that span across events, and they got even better (cleaner, more accurate) post bluebird 2.8. If willing to take a performance hit (they will remain faster than caolan's async or native promises though), they're also usable in production.