Southern Caribbean, anyone going or have you been?

We booked our first southern Caribbean cruise for this coming April, we have already done the east and west. Hoping the different ports will be a nice change. All of our previous cruises have been on the Dream & Fantasy, this one is the Magic. Is anyone else taking this trip or have you ever? Sailing from SanJuan. I'm wondering if there will be a huge difference on the smaller ship Also have never flown in to San Juan. Any tips or info on this trip? I'm looking forward, but just a bit nervous about it too, so used to the bigger ships.