Beth's casita has wonderful views of the ocean and is conveniently located near the main building and very close to the restaurant Mar'sel. When visiting Terranea, I recommend staying at a casita since you can self park by your room, and you won't have to walk a long way to a room located deep within a wing of the main building.
Also, Beth is a great host who responded quickly to my questions. I'd definitely book with her again.