For us, the HBD is the best restaurant in the studios ... and, with the possible exception of Le Cellier and Bistro de Paris, perhaps the best restaurant in any of the parks.
It's a shame you have to burn two credits for it, though. MM is good, just not exceptional. HBD has never disappointed us in a half-dozen visits. It's just sorta special, y'know? Comparing the two is almost apples and oranges.