Gregory is definitely the best English-speaking guide on the island. If you're a foreigner and don't speak French, it's highly recommended to explore the island with a local guide, as most general guided tours are conducted in French (even if they advertise otherwise). Gregory is the best driver-guide on the island — he speaks excellent English, shares a wealth of fascinating information, and offers plenty of ideas for places to visit and activities to try. I can wholeheartedly recommend him! Réunion is a stunning island with incredible natural treasures — I’d love to go back and explore it again, only with Gregory's guidance!