I'm here right now, and this is my second trip with FP+. The first time was last Sept when legacy FP was still available. I left that trip being indifferent towards FP+ for the most part - didn't totally hate it, but didn't like it either. This trip I was thinking was not going to be much of a problem since I can't ride a majority of the big rides. I was wrong. I now absolutely HATE FP+. DD and I have been here since last Monday, very low crowds, and still the lines for rides like Haunted Mansion, Nemo, Spaceship Earth have been ridiculous. I expected problems for this week, but not last week.
I tried several times to change some FP+ experiences or times last week, and for stuff that is not the major headliners, and it only worked a couple of times. Half the time I got a message that there was a blip in the system, and to try again later. When I did get through, most of the time I got the message that there were no FP+ experiences available, or no other time slots available. I could live with the slots all being taken when I try to change something, but I am sick and tired of being so scheduled on this trip. Legacy FP system never made me go rushing to the park to get on a ride, and I never had to go running through the parks to collect legacy FP's either.
This weekend brought in a lot more people, and the ability to change FP+ on the fly has become even more limited. I think a big part of the problem is requiring you to book 3 FP+'s whether you want all 3 or not. I tried to cancel some FP+'s after using the 1 or 2 that I wanted for the day, and I couldn't figure out how to do it. I'm not willing to stand in the FP+ kiosk lines that I have been seeing to get help with that problem. I've had some changes not show up at all even though
MDE said the changes were made. MDE still needs a lot of work.
To top it off, I had a weird check-in experience. I did online check-in like I have done lots of times in the past. The person goes over several things usually, including telling me my balance for my room only ressie, confirming that my credit card is set up for charging to the room, and a few other things. This time, the CM handed me my packet and gave me directions to the elevator, and there was no other person behind me waiting to check-in. I figured everything was set up on MDE so she didn't have to go over anything and I went to my room. Little did I know that a lot of stuff was messed up with my check-in (including charging), and it took 4 times of going to the front desk to get it all straightened out.
Before coming on this trip I was trying to talk DH into letting DD and I upgrade our tix to AP's again, and come back in the fall. I have changed my mind on that now, and will not be returning until next year. I'm not gonna quit coming to WDW altogether, but it will be a lot less (Would not be fair to the 2nd kid, if his sister got to go so many times, and he doesn't get to go at all). Disney got me used to a great system, and I'm not happy they took it away.
All hasn't been bad. I have managed to get my DD (will be 4 in July) out of a stroller. She has done 11 and 12 hour days (7 in a row so far) without a nap and without a stroller. This solves my problem of having to find the perfect double stroller when we come with an infant next time. We also have the perfect room to watch Wishes from my bed at the Wilderness Lodge. Also, I can only recall one grumpy CM in the past 8 days. The CM's have been great.