T-Mobile Simple Choice Plan

Taking a cruise in January 2016 stopping in St. Kitts wanted to know if anyone else has had experience using the T-Mobile Simple Choice Plan there?

I know the country is covered which means I will get atleast 2g access free within my plan but in some countries you end up getting better speeds (3g/4g) anyone with experience using their service your feedback appreciated.

I was just there and I got 3G most of the time :)