Premium rooms have sliding doors on the bathroom that make them more comfortable, and better furnishings that are dark woods and new mattresses (they are worth the upgrade). The bathrooms are decent with a tiny room for the toilet and tub.
The window is small because the bathroom is up against the outside wall. The furniture at Gold Coast Hotel Las Vegas is basic, a small table with a couple chairs and a dresser.
Smallish, clean rooms with nice furnishings and a fairly modern look that includes a flat-screen TVs.