yes, i used WDW Florist last week actually, and was very very happy. the flowers were for my fiance (i proposed to her that night) and i left the florist specific instructions for delivery--i.e., they had to be delivered between 7-10pm. they were very accomodating, and when we returned from the GF after our engagement, they were in our room waiting for us.
i spent $50 for 12 sunflowers (those are her fav flower). when i looked at my statement, they only billed me $35 for some reason. anyway, the flowers were great and lasted not only the 8 days of our trip in the hotel room, but a plane ride home, and 2 days after that. i got the 12 flowers and a glass vase.
i would highly recommend them.