St. Regis Mumbai is a luxurious property with stunning architecture and elegant decor. The staff is friendly and cooperative, and the breakfast spread is impressive. The rooftop bar offers amazing views and a unique champagne sabering ritual. The butler service is exceptional, and the spa is relaxing. However, some guests faced issues with construction noise and slow check-in. The rooms are spacious and well-appointed, but some guests found them outdated and stained. Overall, St. Regis Mumbai is a great choice for a luxurious getaway with outstanding service and delicious food.