Billy Eliott Seating Info

I ordered tickets for Billy Elliot and didn't know until I received them that they are supposedly obstructed view seats. Very disappointing, particularly since they were the same price as center front orchestra. The seats are left orchestra, row H, 9-13. Does anyone know if these really are obstructed view, and if so how much of the action we won't be able to see? And what is it about the set that renders most of the left and right orchestra as obstructed view? Thanks for any info you can share!