I answered no preference . . . and I had to think about it a bit. Both systems have / had their advantages. Certainly, my family was able to take great advantage of the legacy fast pass system, gaining multiple rides on headliners even on busy days. Gone are the days of riding TSMM 4 times on a busy August day with little to no wait. However, being able to plan the time that you go on a ride can be an advantage. It is still plenty possible to do TSMM twice on a busy day, by getting there quickly for stand by, then using FP+ for a second go. My biggest problem with FP+ is simply the tiering. If they did away with that, I would be pretty happy with the system as it stands now. Get all your FP+ selections for the morning, burn them up, and then get a 4th, and maybe even a 5th in the afternoon. It works fine enough. There are still plenty of rides in most of the parks that don't get long lines, so you can fill your afternoons with those rides. I do miss TSMM 4 times in one day though!