Friends in Dalaran

If you get this quest in MoP, none of the NPCs will fly you to Dalaran and neither can you port to Orgrimmar from there. The only thing that works is cashing it in, in the Inn in Dalaran.

Basically the only thing new here, is telling people that there's a portal to your faction capital city. So you can make dalaran your new home.

Turida Coldwind will give you a flight to Dalaran, but she'll charge you 2 gold for it, the same as if you didn't pick up the quest from her. And once you get to Dalaran, the port to Orgrimmar in Sunreaver's Sanctuary is available for use.

Any bugs that existed at the beginning of MoP are fixed (except perhaps that she charges you for the flight, whereas with most other quests that involve taking a flight somewhere, you get a free ride when you talk to the flight master).