When I used it, it was… Not great. Not everything got synced properly. I would create a new actor and my friend couldn’t see it sometimes. Or updates wouldn’t propegate to others unless they left and re-joined. Not only that but there’s like 0 documentation on how the sessions work… All of your work, the action history is saved to a ‘session’. And when the session ends, all your work seems to go away too.
It looks like a feature that needs a lot more refinement before it is really feasible to use. I gave up on it after an hour of playing around.