I agree with mickeyman42, no need to get there too early.
As far as the view, the Con first: it was at an angle, the fireworks themselves appeared to be to the right of the castle from this viewing area, I much prefer to view them from the front.
The Pros: comfortable seating on the grass, no one standing in front of you. CM's insisted on everyone being seated. Plenty of room for everyone, not cramped at all. Tink flew directly overhead, always cool to see.
Hope this helps.