I just back from 三正 today, I check in on yesterday & booked the hotel through 中旅 HK$13xx include one breakfast. The bus ticket from Causeway Bay go & back the hotel (round trip) only HK$120 for adult, HK$90 for child. I compare the price with 517 & the other agents before, I think 中旅 is the cheaper. Hope this information will help all of you.