I've got a YYZ-DXB-YYZ MR setup for next week. I was on the fence about it but now that I've been upgraded in both directions I think I'll probably do it.

For those who have done this run before, there is nothing I need to do or be concerned about when it comes to visas and all that, correct? Just fly over, go through transit security, hit the LH lounge, then fly back?