The pull down beds are great for extra room but they are smaller than a twin size bed designed more for a child. I couldn't see anyone over 4'10" fitting on one.
@TB4244 Great pic!! I had my wedding reception in the Living Seas Salon last summer. Its stunning in person but hard to capture good pics that do it justice.
As long as you have your MDE set up you can make all your dining reservations online through that. No need to call in. Also online opens up at 6am (EST) compared to the phone lines at 7am ;)
Also, just so your budgeting is accurate, Disney imposes an additional charge for a 3rd adult in a room. $10 at values, $15 at moderates and $25 at deluxes per night.