We stayed at Couples Negril, not the Swept Away property. I can't comment on the diving questions as we do not dive. I really like the Couples property, though. We have stayed all over the island and prefer Negril and Couples. It's more of a boutique type hotel and we liked the smallness opposed to the mega resorts we've stayed at in the past. There are lots of extras included in your rate ( ie- excursions , shopping trips, etc) At most hotels , these are add -ons that you have to pay for. I would highly recommend the One Love Bus Bar Crawl. Lenbert is the operator, just ask the front desk about it. It was the most fun we've had in the 7 trips we've taken to Jamaica.
As for the food, it was fine. Probably a little better than your average AI.