1. How is it?
2. We have kids and want a good view of fireworks, maybe a less crowded area...
I normally am a sucker for all things Disney and can find some good things to say about most, but...
1. I wouldn't even pay $15 for this.
2. Then, you don't want this.
It is a buffet but, no chairs or seats.
Guests must stand.
And, that means the kids may have their view blocked.
Also, if the wind happens to be blowing toward this area, you will be in a cloud of smoke and cinders from the fireworks.
No, thank you.
There are
so many places to view IllumiNations at Epcot's World Showcase
that are wonderful in their own way...
• Bridge between UK and France
• Norway area
• Upper level (outside front terrace) of the Matsu No Ma Lounge in Japan
• Italy, near the Gondolas
• Germany, on the east side, at the water
• Mexico, at the new Cantina
• Mexico, bridge to the right of the Cantina (as you face the lagoon.)
• UK, the Rose & Crown outdoor dining area (ressies required.)
• UK, just to the left of the Rose & Crown (as you face the lagoon.)
• Many, many more great spots.
Be sure to avoid any tree branches that block your overhead view,
and watch out for any "islands" in the water
that block your view of the "center" of the lagoon.
Best Tip:
Don't stand down-wind of the fireworks.
Their SMOKE will ruin the show.
So, If the wind is blowing into your face as you look towards the Lagoon, you are in the wrong spot. 
-------------------
On the map below, #14 indicates the location of the "Sparking Dessert Party."