Transportation
The Hilton Garden Inn is three blocks from two MARTA rapid rail stations. From the airport, take the north rail line (It doesn't matter if it's a Dunwoody or Doraville train. You'll get off before that's important.) You can either continue north to the Peachtree Center station or change trains at the Five Points Station to a Westbound train and exit the CNN/Phillips Arena Station. Both are about equal distance from the hotel. MARTA is $1.75 each trip and you can purchase a Breeze card using credit or debit cards.
A downtown hotel shuttle is available for $16.50 each way.
Taxis are $30 from the airport to downtown.