I stayed in 金龍 last Nov, it's new and clean. I added an extra bed for Amah, the space is still OK. Also it is near pier and just opposite to 漁人碼頭, so the traffic is convienent. But the breadfast is bad, may be it was not holiday, it was Monday so they did not make much food.
Addition breakfast is around $35 each, I just add the breakfast for Amah but not my son, my son was only 2 years old. I don't think you need to add the breakfast for the kid.