We visit the parks several times a year (grew up in Orlando), usually are able to travel only during very busy times of the year, and never plan our trips more than a month ahead. (In fact, we just this week booked 11 days starting next Sunday!) So far, our experience with FP+ has been very good. You do have to check more often to find availability for the things you want to do and when you want to do them; but we've gotten everything we've ever wanted, which would be the high demand experiences like Toy Story Midway Mania and Illuminations (during the FWF craziness of Fall Break).