We just returned from our 10th to 16th stay. I have a 3 year old, so we only did MK, but we had no problem at all. We went to MK on Monday and Thursday. Monday we never waited for longer than 5-10 minutes (mostly under 5) and Thursday we waited up to 20 minutes. The crowd in general was much heavier on Thursday--I am sure because it was Extra Hour day, but it was still quite managable. Monday it was very thin. Of course, keep in mind that the majority of our time was in Fantasyland.
I would definitely visit on this week again. It worked out great.
I would definitely visit on this week again. It worked out great.