Well lets see - my brother got married in St. Maarten at the Maho resort and it was wonderful. The food was great, pool was great, beach is on resort as well. The island is beautiful, clean and very easy to navigate. My parents have travelled there exclusively for years.
DH and I took a golf cruise last year and we tenderd into Playa del Carmen from Cozumel. The golf was great but the ride there was like driving on the 401 at times! It was like an expressway but with rust buckets along side you.
Yes, were we got off the tender was a beautiful beach but the beauty ended a few blocks inland. I would not to have wanted to leave my resort after dark.
As for Paradise Island - we took the kids on a
Disney cruise and stopped in Nassau. Paradise Island was beatiful but I would go nowhere else besides that! We got off the Disney ship and tendered out of Nassau to swim with the dolphins. Nassau was awful! It was dirty, dangerous driving and parking! And people were very pushy.
Don't get me wrong, I loved visiting all of these places but to stay for a week - I would pick St. Maarten. But I really like to leave the resort and explore and do things outside the resort and we found St. Maarten a nice island to do that on.