Went the last 2 years. First year we ended the trip right after mothers day, and the next year we started the trip with mothers day. I absolutely love that time and would do it again in a NY second. The crowds are not out of control. We did the Magic Kingdom, MGM and AK during the week. We went to Epcot on Mothers day (we usually don't do those 3 parks on the weekends). We had a lovely time. Weather is nice, usually hot during the day, but have had to bring a jacket for evening. Flowers are beautiful. Lines easy enough to get through.
Shelly