I use MKB and found flying instantly easy and accessible the moment I unlocked the ability. It actually feels better than I expected it to. That said, I do hope SE doesn't feel it necessary to add it to every zone they create from now on. I would like it to be added to at least some of the older zones though and it would be a solid way to add new areas and content without the need for creating entirely new zones. Overall, flying is very good.