Well, I've had my Yongnuo 460 ll for two days now, and I am completely in love with it. It triggers perfectly in S2 (TTL) mode from both my Metz 58AF and the on camera pop up flash. Pointed upwards with the diffuser head it lights close subjects in conjunction with the triggering flash quite wonderfully and evenly. And it recharges faster than the Metz. What a bargain secondary flash.
I'm just going to order another one