You must be young.

Having arisen at 4:30 am, and after two flights, we arrived at SJU sometime before 4 pm. Another 45 minutes or so to get our bags, follow the porter to the hotel, check in and get settled. About 5 pm we took a taxi to the Metropole for a nice Cuban/Puerto Rican meal (on ilon time). A few hours later it was back to the hotel to watch the news and turn in. Then up at 5 am to have breakfast, check out of the hotel, check our bags in with Seaborne, get through Security and do a little duty-free shopping before the 8 am flight.

The check-in with Seaborne took a while, because we had to prove we had paid for the bags. We were early to the gate and the plane was late, so we did wait, but not that long. Bottom line: there may be less free time than it appears. YMMV.