If your question is whether it is acceptable for entry into SXM, the answer is yes, if done at Walgreens. Around here, that test isn't available anywhere, but I guess it is available where you are. The time period on it is 48 hours.
We used ID NOW from Walgreens--it is considered a PCR test so can be done 72 hrs. prior to departure, unless anything has changed. We were not charged and got the results back within 2-3 hours. Don't have any info on binax NOW as we didn't use it.