Green Cactus in Stony Brook consistently has excellent Mexican food. The ingredients are fresh and the dishes are delicious.The place is pleasant to eat in and has a decent outside eating area. Many people though go for take out. Either way Green Cactus is a reliable place for good Mexican in Stony Brook. This review is based on many visits here over several years. I've never been disappointed. This place is well known and popular so it can be quite busy sometimes.