After over 28 trips to WDW, I knew I would hate FP+. I don't even make ADR's because I don't like to plan. I Never know what park I will be in on what day.
I was there in May for three days with no plan. Was to meet my mom and as I was boarding the plane in Michigan, she was at the airport in Arizona and didn't feel well so she didn't come. It was solo for me. The first day, I decided to go to MK and that morning bought my ticket at the hotel, AKL, and the reservation desk booked my FP+. NO 7DMT. After I rode my 3 FP+ riders, I went to the kiosk and got 7DMT for 8:00 p.m. Next day I did Epcot, same thing, bought the ticket and booked the FP+ at the hotel. Didn't get Soaring so I did have to wait in line for that. I din't book any ADRs but did check, and there were some available both days, late times, but still available. Third day I did pool, and DTD, it was actually the day I left.
As one who was convinced I would hate FP+, it wasn't that bad. Now going the beginning of May of course meant that it was not as crowded and would be easier than summer or holidays (no longer go summer or Christmas after many years, too crowded and no longer have kids in school restricting when I go). All in all, it was ok. Had I been going with more people, at a busier time and had to plan, perhaps I would feel differently as I have said, I never liked to plan. I do love disney but it not a relaxing vacation. To me, that would a beach in the Carribbean with waiters bringing me drinks. lol