Calling something 'nice' is one of the highest compliments here in Grenada. Food doesn't taste delicious, it tastes nice. Hanging out at the beach isn't relaxing, it's nice. On the flip side, to say something 'is not nice' is a pretty low blow.
Here is a scale to clarify:
Really Nice= Amazing
"That oil down was really nice, it was the best I've ever had!"
"The movie was nice but I liked the book better."
Not Nice= Bad to terrible based on intonation and facial expression
"That bus driver is not nice, he bounced a kid last week!"
At first I felt like Grenadians were missing out on using a whole range of descriptive words, now, I kind of think their usage of nice is, well...nice :)