On a recent trip with Prince and Princess plan, we used our $50 Disney Dollar, character breakfast ($52), Planet Hollywood discount ($25) and collected 2 Disney pins and lanyard ($20). These items total to a little more than we pain for the plan.
We did not use the special seating coupons. These coupons required a PS for each show or arriving 30 minutes prior to the show. We got good seats by simply walking in with the rest of the crowd.
The special seating coupon are only valuable if the park is very busy, or if your prince or princess would like to be chosen to participate in the show.
-Paul