I took up a similar JY offer last year on Voyager, it was really good value and well organised, the ship is small only around 400 or so passengers which is good, the crew were excellent and got to know the passengers which meant really good service. The JY rep on board was excellent, I'd certainly go again if there was a JY rep on board. The only slight downside is you don't always get an overnight in a port and so miss the chance to get the full experience of the place, but overall I found it good value for money and having had a couple of days ashore in Borneo now want to go on the full JY Borneo tour.