here's the link for a video I did back a little while ago.
I LOVED Nirvana with my kids...(age 6&9 at the time)
i think after we've travelled to Negril over the past couple years...something not to forget about is the shade (like Lady Jane mentioned) Nirvana's property is perfect for kids...and the cottages are nice a big, and security guards were great too!
My boys loved Nirvana and said it was better then Disney!!
http://youtu.be/B8wq7oPhQGs