I have enjoyed trying Edit Replay in Lr on my iPhone.
However, I do very little editing on my iPhone/iPad, if at all. I do most of my editing in LrC on the desktop. Invite to Edit has been a very useful tool when collaborating with others once my image has left LrC for Ps. What would be really great would be Edit Replay for LrC. This way I could share all the work in LrC before it got into Ps.