Overall it went really well. I was started booking right at 7 AM, during the selection process the page gave me graphic of Olaf saying there was a problem, but each time I was able to refresh and continue on with no issue and really no wait for the re-fresh time.
I got a Frozen FP in case there is no dessert party, but it messes up my ideal EPCOT touring plan (first world problems).
I was able to get FOP twice during our week.

I was pleased that the start times for FOP FP are 10:15 for one day and 10:20 for the other day and not at the end of the day.

So I do not have to change my dinner or lunch meal reservations to accommodate a conflicting FOP time or be rushed at a meal time/worried about making a FP time.
I did have some flexible to be able to choose two Animal Kingdom days out of a possibly of 4 touring days and we have Hoppers. So I picked the ones that had the FOP availability at the best time for us.
DHS & MK, was able to get what I wanted at the times I wanted.


No issues with Mine Train. I booked Mine Train after FOP, and after our EPCOT day and it seemed to have lots of availability. Over a year ago, I was booking fastpasses and it seemed like Frozen and Mine Train were so difficult, but this time I found plenty of availability. YMMV
I luv Disney, but my biggest bug-a-boo is all the advanced planning without having all the release dates and times for entertainment etc.