We stayed at Corona del Mar in July and loved it. I would absolutely stay there again if I go back to Belize. We stayed at a different resort the first few days of our trip and it was so far from everything that we didn't get to do anything we wanted. We arrived at Corona del Mar at about 11:30 and Miriam immediately scheduled us for a 2:00 snorkeling trip. She was incredibly helpful in arranging other trips for us and giving us restaurant suggestions. The rooms were clean and comfortable. The free, cold water was refilled every day, which was an especially nice on those warm days. The location is perfect - close enough to town but far enough so you're away from the noise and crowds. You can't go wrong with Corona del Mar.
Have an awesome trip!