We were there for Spring Break this year, and did EE 3 or 4 days. (can't remember exactly... I've slept since then!) I would get up at 6, and then wake DH and DS around 6:30. We would leave at 7-7:15 to be there by 8, grabbing a quick breakfast on our way. Since we had our own car, we went to the McDonald's over by ASSp a couple of times. Other days, we would just have a snack (cheese crackers, cookies... nutritious, I know... but hey, we were on vacation!) on the way and then have a good (early) lunch at the park.
As for if my son liked doing this, the answer would have to be NO. However, he doesn't like getting up early ANY day, so at least he was OK with it since we were in WDW! There were a couple of days that we went to bed early and/or took a short rest in the afternoon to help us all deal with the early wake-ups.