Used Both With Good Experience But $$$ Overnight Parking
Been there several times in the past two years in a Cessna 172. Have used both Signature and Atlantic. At both treated very well, same as if driving the heavy metal on their ramps. Atlantic excellent last visit in 2018 helping with transient maintenance-dead alternator.
Expect hefty overnight parking fees vs small rural GA airport.
Parking/tie down at Atlantic $20/night last visit in 2018, they waived $40 facility fee because bought gas.
Parking/tie down at Signature $28/night, waived 1 night with fuel purchase, also waived $40 facility fee with fuel purchase, charged single $5 "infrastructure fee" during visit late 2017.
YMMV