My favorite kitchen anywhere in Orlando is Imperial Palms. The master bed/bath is enormous. Imperial is a 3/2 unit with a King, a queen/sofa bed, and 2 twins. It is a smaller resort that is closest to Disney out of all Orlando Marriotts, and use of the World Center is a huge plus.
Grande Vista is 3/3 with either a King, 2 queens, and 2 full beds or a lock-out with a King, 2 queens, and a King studio. The Marriott Grande Vista indoors kids Center is amazing for young children- think a massive Chick-Fil-A playground with activities every hour. I do not enjoy the many speed bumps into the resort at 6 mph.