I guess I'm in the minority- I had excellent meals at both places.
Hollywood and Vine- When I called for the Fantasmic Package, I could only get the first dinner seating (I believe it's 4:20, or 4:30, but the memory is a little fuzzy.) It ended up being PERFECT- a downpour started right at 4:15ish. Everyone was wishing they had ADR's for that moment!

Anyway, I guess this is why we enjoyed it so much, because the restaurant was totally clean and the buffet hadn't been touched when we walked in. Our server was wonderful- so much so that I remember that she was from PA because she was very personable and talked to us quite a bit. We got to the back entrance for Fantasmic pretty late. I think we were one of the last people they let through. But, luckily, they still had the ropes up. We sat all the way to the left of the special section, and I thought the seats were good. Oh, and a bonus- that rain at 4:15 delayed the parade, so by the time we were done eating, we were able to walk right out on the porch and hear the parade getting ready to start.
Mama Melrose- We didn't do the package, but we had an excellent meal. However, this was on
free dining. This is one of the only places that brought out what the bill would have been, and it was $169. We were 2 adults, 1 Disney Adult 10 y.o., and an 8 y.o. And that doesn't include Dh's Italian beer, which of course we were billed separately for.
I still haven't done Brown Derby. It's the only restaurant at DHS that my family hasn't eaten at!