I did this 2 years ago. And recommend it again. Fantasmic is my favorite.
I've heard that 50's Prime time gets on the package, when you call GR, ask them if 50's is participating-- I think it's a hit & miss with them. We did H&V-- I thought the food was good & it was better for your buck-- espcecially if you have those that love to eat!
when we were done & it was time for us to do fantasmic, we got there pretty early-- if you have little ones, bring something for them to entertain themselves- mine has ADHD & it was our 1st day there & his 1st trip & he was bouncing all over the place. We got great seats too!!
word of caution, if you sit in the very front row-- look over the railing, if you're where the fire shooters are, it may get kinda hot in that row. we sat back about 5-6 rows & were great. it's stadium seating so you won't miss a thing!