As a former/recovering business traveler, I understand not wanting to be sitting at the airport for extra time, especially on vacation. But there is a big difference between cutting it close at a major US airport and cutting it close at SXM (or any other island airport). If you miss your flight there are not a lot of other options or perhaps no other options to get home that day (or worse). I always target the 2.5 to 3 hours at SXM. Especially now that renovations are complete and hanging out is relatively comfortable.