There are totally 50 bus routes to the Window of the World from all over the city. In addition to the buses mentioned above in the table, there are also sightseeing buses and so on. It depends where will you stay and leave for the WOW. Would like to help if you tell more details.

Take the KCR to Shenzhen LO WU terminal, the border. Right after you cross the Chinese Immigration counters, you will find the exit inside the building to the Shen Zhen Metro, which takes you to the window of world, terminal of the line. East Tsim Sha Tsui -- Lo Wu HKD 36.50 one way, 42 minutes Line 1; Shen Zhen Metro Full Trip Fare (Luo Hu --- Window of World) RMB 5.00 one way, 30 minutes. You need about 30 minutes max to cross border. Hope this helps.