The knob to adjust overhead air vent was really dirty. I used a paper towel to turn it. Also, it took over an hour for the passenger luggage to be released in baggage claim. That was frustrating b/c it was after 1am. Lastly, I've never flown Frontier before and I was annoyed to find out that I had to pay more for my bag after I purchased my ticket. I'd prefer it if you would increase the price of the ticket instead of adding costs little by little. My $60 flight ended up being closer to $150 after all of the fees. That's not good business.