Booked Frontier to DEN-CUN as the price was $150/ticket less. Now, I wish I would have done some research before the purchase. I had not flown F9 in quite some time and assumed not much had changed. My in-laws flew into town this week on F9 and proceeded to inform me of the new slimline seats and the miserable experience they had. In a panic, I jumped online hoping, praying that the bus we were taking would still have the old seats. No luck and now disappointment and dread has set in......not looking forward to the 4hr trek to CUN. Any advice on ways to make the experience more comfortable would be greatly appreciated. My kids are going to be even more disappointed now that the DirecTV option is ghost. Will definitely only consider F9 for short hauls at extreme discounts from this point forward.