I had a trip planned to stay at the Caribe for the end of April for two nights before my cruise. They were scheduled to open in December, around the middle of November I received an email from the GM they were having delays with construction and cancelled my reservation. Once I received notice of this I started searching for a new hotel and boy did the prices really go up ( keep in mind San Juan charges an 18% resort fee of the total price of your room).
If it was me I would maybe book another hotel as back up just incase they have anymore delays and then you can always cancel it a few weeks before you go.
I hope they open in time for you, the property looks AMAZING!!