@ellybeth - There is nothing wrong with a statement rug, but you should definitely be certain that you love the pattern and all the colors in that statement rug before you commit to having one in a particular room.
The rug in the picture your decorator provided to you has a terrible color combination in my opinion. I cannot get past the pale, cool-toned blue-gray color paired with the neutral, warm, wood tones and tan color in the rug. I could never live with that particular color combination, with the grey walls and the gray furniture, but that is just my personal opinion. I need to have cool colors with other cool colors and warm colors with other warm colors in my living spaces.
Also, as others have mentioned, artwork on the walls will need to coordinate at least colorwise with whatever rug you select, and that will limit your options for wall art (which I consider to be more important to a room's decor than a rug).
I wish you the best in your decorating endeavor! Decorating can be fun, and a bit daunting, but at the end of the day, be sure to choose what appeals to you and to your eyes!