We've been there 8-10 times, last time was a couple months ago, DW loves it.
A quick tip from experience - we had a reservation in Nov 2016 for a Monday and it was unseasonably cold and windy, like upper 40s F which is not really conducive to walking around in swimsuits. We showed up for our reservation and said geez it's super cold, they said yeah not the best day for swimsuits but DC offers one free date change so how about another day later in the week? So they changed the reservation to that Friday when it was 78-80F and we went to MK on Monday instead (tougher these days with needing dated reservations, of course) and enjoyed DC on Friday.
So if you plan a date, try to make it maybe 3rd or 4th day of your vacation to give your feet a break during middle of vacation, but also to have some leeway in there to reschedule for a few days later if the weather doesn't cooperate. It may not work out, but good idea to have the days planned to allow for the reschedule if needed.