Hello! Flying Frontier Airlines ATL Terminal was a good experience for the cost. Terminal signage was easy to read, and I had no issues locating the Frontier counters. Employees were courteous and assisted in expediting things during check-in. The terminal wasn't very crowded when I got there, but it filled up near departure time. Gate seating was scarce, but manageable. I wish they had more coffee and food available in the vicinity, particularly during morning flights. Security was approximately 20 minutes, so come early. As a no-frills airline, I was happy just have your expectations managed and you will be okay.