I booked on their website. Everything was clear. I knew I would have to pay for bags so we checked in one large suitcase for the two of us and two laptop bags we brought as our personal items. I paid $200.38 for TWO round trip tickets including a checked bag from Phoenix to Portland. How can you beat that? I did not check in early or pay for a seat. I took a gamble hoping we would sit together and just checked in at the kiosk at Sky Harbor. I figure everyone was going to take the cheap or free seats until the only seats left were the towards the front. Turns out we had 25.00 seats and together. I would advise to get there 3 hrs early. We had no line, and no trouble checking in. I knew the seats were crammed pretty tight ahead of time afterall, its a budget airline. But for less than 3 hrs, I could deal with it to save money. I would fly Frontier again if my flight was under 3 hrs. No issues. Just read the policies on their website before booking. No issues with customer service either.