I stayed at Wentworth by the Sea while visiting Portsmouth for a business meeting. I found the staff to be kind and accomodating, the food to be first class and the rooms to be large and extremely comfortable. I particularly appreciated what seemed to be warmed flooring in the bath - a wonderful feature on a cold November day. The hotel was quiet during the week, not a lot going on.
I always use the exercise room when traveling. This one was was reasonably sized, the equipment was in good order, and the facility was clean. The location does not seem to own a large expanse of property, but the neighborhood is excellent for a walk or run, and the scenery is lovely. It is an easy drive into Portsmouth for shops and great restaurants.