While there is nothing more to write about Halong Bay, the site itself is gorgeous and to stay on a cruise for 3 days, it's divine. Do it if you have the time.
About the cruise. The staff were personable, and really polite and accommodating. 5 stars for them! The guides were friendly and informative while the servers (everyone have their own personal servers) were really attentive.
Food, both on cruise as well as at the Viet Hai village, were awesome good. The tours provided were really good too!
The cruise ship is about 5 years old. And while the rooms were large, the condition was not that great, and that's why I deducted one star. The doors to the toilet would not close. In order to close it, you have to lock it from inside. That's fine but it's annoying when I turned on the air con, and the toilet door is ajar. Safe in the cabin also doesn't work.
It's a minor issue, and I understand with the limit of water, but I once woke up in the middle of night at 3am and there was no water supply to flush, or to wash my hands. But this is only a small issue.
Overall, it's a good experience!