The ferry is air-conditioned. It gets a bit cold inside the ferry so better bring a light sweater. There's a TV in front playing a comedy series in Bahasa language.
Upon arrival at MUARA Terminal in Brunei, you have to line up for the immigration again. And then you would have to have your things go through the Customs’ X-Ray. I saw some Ferry Terminal police officer and security guards watching a Tagalog teleserye dubbed in Malay. They were watching Jericho Rosales. Lol!