So I've been reading about the Overflow thing, it's not bad overall, actually even considering the amount of player yesterday the game went pretty smooth lagwise.
But the main problem with the Overflow shard is how difficult it is to play with friends. Somehow there is a "join" option when you right click on your party portrait, but no matter what we did we couldn't play together at all yesterday. We tried grouping/ungrouping logging in/off , pressing the join option each time, both. The only place we managed to see each other was in town.
Also I've read that you could join your friends for their story quest, but how is it done? When trying to join the story area, from a city (we could see each other there), there was no option to join.