We chose Au Co to cruise around Halong Bay over Christmas and found it to be just a wonderful experience. The boat was just Fantastic and the staff amazing. We were treated great and nothing was ever a bother to staff who wanted us to enjoy the experience. Highlights were kayaking, squid fishing, Masterchef class, caving. The food was outstanding and the service first class. I would highly recommend Au Co to anyone that want to cruise around Halong in luxury. If only we had another night!