Michael K. writes: On Spirit's web site, they encourage you to check in baggage online to save money before arriving at the airport, so i did just that. However their online baggage check in doesn't tell you that small bags fly free. Their site only states that ALL carry-ons must be paid for. So I paid for small carry-ons and found out at the terminal that small bags are free. After contacting customer service, their response was, "Too bad. We dont refund bag fees. End of story."