Hi, I just returned from a BW studio two weeks ago. The rooms are around 430 square feet (tad bit bigger than poly). They also have a kitchenette. When you walk in the door, you have sort of a small welcome area and are looking down a hallway towards the bedroom. The kitchenette is about 3 feet up from the door and has a sink, refrigerator, toaster, coffee maker, plenty of cabinet space. They will also have a small supply of paper plates, bowls, glasses and utensils as well as a small dish liquid to wash with and extra napkin roll under the sink. We brought plenty of snacks and nothing ever looked crowded and you had plenty of counter space to fix your meals in the a.m. Directly across from the kitchenette but pushed back on the back wall (at least 5 feet deep into the room) is the bathroom sink area with full wall to wall mirror. There is plenty of counter space as well as storage space under the sink which includes makeup drawers. The closet with sliding doors is to the right and has extra pillows, sheets, maybe some babygear (our room had a pack n play and highchair in it), wallsafe, iron/borad and luggage rack. It is a nice size closet. Directly on the other side opposite of the closet is the bathroom with bathtub, toilet and towel racks (about 4 sets of towels). There were at least 4 trashcans in the studio and each one had plenty of extra trash bags at the bottom (we emptied our own trash everyday). Continuing past the kitchenette down the little hallway is the bedroom area. Now to me this area did feel a bit small as the front area with bathroom, outside vanity, closet and kitchenette does take up a bit of room. There was a queen bed and full sofa bed (it is hard to pull that bed up out of the sofa). We had room #5065 (5th floor by elevator with view of main courtyard and BW looking out toward Epcot and Flying Fish, ESPN). We also had a daybed against the wall in this room. The TV is in an armoire which has 4 deep drawers for clothing storage but only has a 20" TV in it. The room also has the normal table with two chairs. The balcony is small but 2 people can sit out there without feeling on top of each other.
Overall we really enjoyed it there. The room is set up differently than regular resort rooms. Other rooms probably feel more open than this but the front area where the kitchenette/bathroom does take up a lot of the space and makes the bedroom area a slight bit more closed in. Now, I would tell you that if its you and another adult, you'll enjoy the room. If its you, spouse and two kids - then your probably going to feel on top of one another.
Additionally, the BW is noisy if your room faces out over it. However, when we closed the balcony door you couldn't hear anything. Lastly, Luna Park is a blast and you must go down the waterslide if you like to swim.
Have fun on your trip.