I recently was “warned” about this a few weeks ago. To me, it was a huge win to be in control of the flights! I improved both SW flights that NCL booked and it only cost me and extra $120 for both tickets! Win, win…Home hours earlier, direct flights both ways, and in control of the flights. $120 plus $230 what I paid NCL, in the end I still saved over $400 if I had booked them myself!