Having eaten at both Chef Mickey's and Tusker House, Tusker House is the winner hands down. I highly recommend trying for an 8am (8:05) ADR. You will get to walk in the park while it is empty and you will be ready for that first safri of the day at rope drop. Speaking for myself, if you cannot get an early before opening ADR, I would not bother. The food and characters are great, but there is nothing that would have me spend valuable morning park time at a sit-down meal.