We had such an amazing time at the Williams' residence and at Nonsuch Bay. The house itself is well appointed and comfortable, and we made full use of the kitchen and had many meals at home. If this is your plan, best to stop at the large grocery on the island on your way in. Necole who was our greeter and housekeeper could not have been nicer and she did a great job in familiarizing us with the house and in keeping it up for us during our stay.
Nonsuch Bay Resort is a fantastic place. The staff was so gracious and friendly, and our two younger children (ages 8 and 4) loved the resort's kids' club which offers an array of activities to keep them entertained with daily variety. If you plan to utilize the kids' club I would highly recommend that you call ahead and ask for Natasha who runs it. She is wonderful and will be of great assistance.
My older son, age 9, enjoyed sailing and learned how to windsurf at the kite boarding school. My wife also challenged herself with learning how to both windsurf and kite surf, and as far as we can tell, the instruction is world class. I enjoyed the use of 5 different types of sailboats (I think they have 6 types total) and the place is really a sailor's paradise. If you don't know how to sail, they provide excellent instruction at the resort.
Antigua as an island has lots to offer and next time we plan to see more of it. We went zip lining and spent a day at the beach on the Caribbean side as well, but mostly we just hung around the resort. We also went sport fishing with Captain Derek on the Obsession (which I would highly recommend) and grilled our catch of Wahoo and Mahi Mahi on the large grill at the house.
The beach at the resort is not a "wow" beach but it is nice and there are palm trees to provide natural shade. And it is an excellent place to relax.
According to the staff spear fishing is legal in Antigua so if you are into it bring your spear. There are tons of fish around the dock or a short boat ride out to the reef at Green Island (they provide free trips every other day). There is a very nice beach there as well.
We will definitely be back.