Recent Saba grad here, currently halfway through my intern year at a University EM program. Congrats on being accepted to Saba and good luck. Our yearly match list does have some superstars. Hopefully your acceptance to a Caribbean school means you've exhausted most other options stateside though. Here's my 2cents...
Let me start with the pros of the program - The path to success is in place IF you study hard and pass your tests. In my experience, the educators are knowledgable about their subjects and generally have an earnest desire to see you succeed. There are frequest tests on the island (5 block exams per trimester), all of which are computerized in a simulated testing center type atmosphere. This becomes so routine that it actually made me feel riiiight at home taking my Steps haha. There is also a 5th semester Kaplan course dedicated to Step 1 studying. Most students (myself included) despised this class as it was tedious and repetitive, but I assure you that it was definitely time well spent for those of us that used it wisely. I felt thoroughly prepared for Step 1. Lastly, the island is beautiful, incredible, and I had the best view of my entire life there. My roommate and I snorkeled, caught lobsters daily, and the hiking is great. If you don't like what the island has to offer, there's something wrong with you, not the island.
Cons - The class time involves long hours and the subject material is, of course, difficult. I did a post-bacc program in Chicago that shared a few courses with the medical school, and I can tell you that on Saba we spent more than double the time per week in the classroom. This can be tiring. Also, though the island is amazing, it can be terrifyingly small and out-dated. You will run into classmates and professors everywhere you go and sometimes the island feels even smaller than its 5 sq mi. The internet is sub-par and expensive, and having to rely on rainwater to flush your toilets can be quite demoralizing at times. I'm not trying to scare you, just trying to mentally "toughen" you up!
Though it is respected among certain residencies familiar with Caribbean schools, Saba is still a Caribbean school. My board scores were in the 240s, I have 2 Master's degrees, and I rotated in large University hospitals, but it's very difficult to shake that Caribbean title once you have it. I received tons of pushback during my residency applications for this simple fact (I applied to a fairly competitive specialty, but still). So you better be heading down there with something to prove, because if not, you're doing it wrong. Many of my classmates are succeeding in great programs because they worked hard, but even a broken clock is right twice a day...so the onus is on you to perform well. Best of luck to you!