We didn't do Sandals in Antiqua, but in St. Lucia and felt it was a nice break and worth the money. Nice relaxing day and they really welcomed the "cruise" passengers. Food was decent, not exactly what we were used to on the ship, but OK. We enjoyed it.
My wife and I stayed at Sandals Antigua for a few days on our honeymoon. Very nice property. I would have to agree that the food is lackluster, but it is by no means bad. The property, swimming pools, bars, and beach are all very nice, and it will make for a relaxing break for you.