We attended EMM at MK last August. We got there about 15 minutes late. We found the crowds to be quite low (and from what I have read, this is by design, they only sell a very limited number of tickets for the events). My wife and son were able to ride 7DMT about 7 times in the hour that we had. I rode 7DMT about 4 times, and also rode Pooh (twice) and Peter Pan (also twice) within an hour.
We then had breakfast toward the end of the event, as the crowds were starting to build up, and after breakfast, got out of Fantasy Land, and headed into Liberty Square, and on toward Frontier Land, areas that hadn't gotten super busy yet.
My family all agreed that the event was a good value, considering the number of times you are able to ride 7DMT with pretty much no wait, not to mention Pooh, and Pan. Normally, you are fortunate if you get to ride 7D and Pan once in a day without a long wait. We enjoyed the event enough last year to book it again for this coming August!