I was there off-season, mid-March. The room and property were in excellent condition. The king-size bed was comfortable and the linens were good quality with extra pillows in the closet. The room had an ocean view, and housekeeping was pristine. Not a crumb or anything else where it shouldn't be. TV and WiFi worked well. The only minor gripes was that I had to use a converter in one of the two accessible AC outlets for USB charging, and the sink is tiny, with a place for your bathroom supplies on a nearby table.
The restaurant Feather & Wedge was about a 15 minute walk, and the food and service were excellent.
Parking in Rockport is free during March, and if you don't like crowds, that is the time to go.
Overall, I highly recommend The Cove at Rockport.