What is the best way to get from Beijing Airport to Holiday Inn Express?

My family and I will be arriving at the Airport on Aug 22 at 6:40pm and flying back out of BJ on Aug 29 at 8:00 am. We need transportation to the Holiday Inn Express at No. 1 Building, No. 1 Minzuyuan Road, Chaoyang on Aug 22nd and back to the airport on Aug 29. What is the best mode of travel for a family of 3? Shuttle or taxi?