Hi! Frontier Airlines DEN Terminal is decent but not fantastic. It's generally busy, particularly at peak times, so you can count on long check-in and security lines. Seating areas are tolerable, but a power outlet can be hard to come by. The food options thin out after reaching the gates, so get your snack or meal in the main terminal. Low prices with Frontier are wonderful, but don't overlook baggage fees. If you're looking for a smooth, no-hassle experience, this terminal might feel a bit stressful. Still, for budget travelers, it gets the job done!