Honestly, the FP+ system, MBs, worked fine for us. I used them 6 days in October, 1 in November, the November trip was not really for parks, but we did drop by DHS to see the lights, and less than a week out I got FP+ for TSMM, the only attraction we wanted to do.
They worked for Magic Express, for our doors, for charges, we changed resorts, we had 3 different stays, 3 check ins. Our only disappointments...the GR at International Gateway could not let me charge with the MB...so I had to go back to the room, but my
scooter had a glitch, so I was heading back to BCV anyway. My other 'peeve' is that you still need to show something for discounts.