HGVC SeaWorld is a very nice resort - the pictures at the RCI site and at the HGVC site are representative of the resort. We've only stayed in a three bedroom unit and thought that was quite spacious. If you request and get a high floor in a room that is on the north or east sides of a building you should be able to see the fireworks from SeaWorld from your balcony at night. The units were in stellar condition when we were there several years ago (I don't know if they've since been refurbished).
The resort has some nice, though somewhat standard, features - nice primary swimming pool area, tennis courts, a functional secondary pool area, playground area, picnic areas, a fairly large list of childrens' activities, etc. There's a typical resort store and deli, a bar and grill type restaurant that's adjacent to the main pool.
The resort location is great, very near SeaWorld and their Aquatica water park. There's access to and from I-4 just around the corner on Central Florida Parkway. There are two Publix supermarkets within a couple of miles of the resort (one on Central Florida Parkway, one just off International Drive), and a Super
WalMart that's two or three miles away on Turkey Lake Road. Easy to get to from the airport via toll road 528. Outlet shopping is close by (Premium Outlets just a few miles down International Drive and behind another HGVC property).
The only drawback that I found at this resort was parking. There were several times that we couldn't find a parking space anywhere near our building.
Dick Taylor