I'd pay close attention to the railing. Getting it solidly anchored and
flashed can be difficult.
You don't mention flashing deck to the wall of the house and that is
important.

I had a deck done with Seal O Flex in October 004. Nice copper drip
edge. The material is tearing at the joints in the drip edge. Problem
has not been resolved, but I would guess movement in the drip allowed
it.

TB