The complex also includes a hotel and entertainment space. Restaurants and shopping ring the outer area of the casino in an indoor mall-like setting and are accessible to everyone, regardless of age. Only those 21 and older may enter the casino area itself. The casino is located at the center of the complex and offers a mix of table games and lots, and lots of slots.
There's plenty of free, covered parking, although traffic into and out of the complex can become congested at peak times (especially around dinner time). I'm not much of a gambler myself, but I was very excited to visit the MGM National Harbor to experience its sheer size and vastness and dine at one of the on-site restaurants.