Depends on arrival time & how much luggage you have. The JW 'Central' is about 200 meters from the intersection of subway lines 2 & 4, thus do to transfers you would not want a lot of luggage. Depending on traffic its about an hour taxi ride through the city. Taxi cost of about 125 RMB. The taxi is the easiest, & for a first time visitor could be an interesting viewing trip of Beijing.
Previous thread posts have JW 'central' comments. Its a good, modern JW.