Some of the streaming services restrict content or out right don’t work based on location. For instance YouTube TV doesn’t work outside of the US. Netflix offers a different line up in different countries. So the Roku device would certainly work but the different services might not.
It works but numerous apps will not work because content is restricted outside the us. Netflix works but what is available is different than in the us. We use our Roku stick everytime we go to St. Maarten. Just don't expect to have the same content available as in the us.