Made the trek out to Terminal 2 at MSP and bought my first Spirit flight, the check in area had a solid vibe of "caveat emptor" with pretty much every passenger checking in leaving with a fair amount of cash less than they arrived.
I thought I arrived at a quiet time but a delayed flight killed that idea, after waiting for 10 minutes for the sole agent that could handle selling tickets the puchase itself took nearly 30 minutes due to seating complications. The trouble came when I wanted to add the Big Front Seat on one of the legs, the agent offered to sell it to me for both directions despite my knowledge their was no availability on the return. That cleared up and the total was ~$25 higher than I expected, it turns out that the Big Seat is more expensive at the airport than online. Booked without seats for an all in roundtrip of $39.60 and I can add a seat upgrade online later.
I was chatting with the agent while he fought wih the computer and was told that about half of the flights since starting service here have faced oversells and told me I was passenger #128 on my flight. Interesting that the low fare still exists with that few seats left. Also how flexible/useless is a Spirit free flight certificate?