I'm planning on taking one of these routes with Trans-Island Limousine from HK to mainland China. In this PDF, it seems that item 5 specifies that passengers are limited to one luggage of size 25"x16"x9" and under 22 pounds, and another piece of size 15"x10"x6".
This seems ridiculously limiting compared to buses in the US. I'm wondering if anybody has had experience bringing large luggage aboard these buses. I plan on having quite a bit of luggage (one check-in sized luggage, and one airplane overhead carry-on sized luggage). Does anybody have experience with them? How strict are they about luggage? Are the buses really small or unable to accommodate a lot of luggage?