Personally, the portraits aren't really about the quality. I think most would agree that the wedding pics are far better than that of the MK BP. My wedding pictures (Randy Chapman) were better. I did like my MK portraits, but only a couple of them were really nice. Is it really worth $1000 for a couple of nice pics, no. Is it worth $1000 for a couple of nice pics in front of the castle and to experience a wedding photoshoot in MK, yes it is.
I would look at other brides photoshoots to get an idea of what kinda pics are generally taken. That way you have an idea of how your pics may turn out.