Based on the reviews, Madurai Appu in Villupuram seems to be a hit and miss restaurant. While some customers have had good experiences with the food and atmosphere, others have experienced food poisoning, bad customer service, and poor quality food. It appears that the chicken tikka and mutton chukka are popular dishes, but that other items such as fish varieties should be avoided. The restaurant also seems to be expensive for what it offers. In conclusion, Madurai Appu is a decent option for non-vegetarian food in Villupuram, but customers should proceed with caution.