YouTube Collabs Are Better Than I Realised! Has Anyone Tried Them?

I only just discovered this today after collaborating with another channel. YouTube allows us to add collaborators and send and accept invites as one which displays the collab video on both or more creators channels, how cool is that! It means you can do a collab for their channel and they still receive some promotion from your own subscribers to their channel and video without needing to make as much effort in promoting with the added benefit that as a one way collab still are benefitting still instead of it seeming one sided. Really love this. Anyone else tried it? What do you make of it? Did the collaboration and the feature actually bring you new subscribers/views?