This is a standing show, there are a few benches in the back, and a wheelchair area on the top tier. (3 tier area, with a grassy area up above that that may still be blocked off since its brand new sod) We watched from the middle, top tier. We walked around all the areas to get a feel, and anything in the middle works great, even the bottom tier.
Don't attempt to watch it anywhere outside the central park area, though, the whole thing is geared to that viewing area. IMHO, the best part is the Trolls section.