What is the best transportation option from Beijing airport to Best Western Premier Royal Phoenix ?

Hi, at the airport, you can take airport shuttle bus line 2 and get off at Dongsishitiao Station. It costs about CNY 10-15. Then you can walk to Weijiahutong Station in about 4 min to transfer to take bus no. 684, 204 or 106. Getting off at Qianlianghutong Station, you can walk to the hotel in about 3-5 min.
By the way, actually it is just about 7 min driving distance from the hotel upon your arrival at Dongsishitiao. Therefore, you can also take a taxi to the hotel at Dongsishitiao if you have large luggage.