We also have had excellent wheelchair service in SXM from curb to plane coming home and plane to luggage carousel and then to curbside on arrival through all the different obstacles these days. I may be mistaken but I don’t believe the wheelchair porters have anything to do with the various carriers, in SXM or the States.

We haven’t had a lot of occasions to use the wc service but I will concur - AA arrival and wc pick-up in the Miami international arrivals area was the pits - so much so I think I wrote about it extensively in one of my trip reports.