i travel between Las Vegas and Denver 3 or 4 times a year.
Usually I fly Southwest or Frontier, but after finding an unbeatable rate, I decided to give spirit a try. BIG mistake. Even compared to the other "budget" airlines, Spirit was a cramped cabin. Their hidden fees made my trip almost twice as expensive as it would have been if I'd just flown Southwest, their flight attendants were rude, and it was just a horrible experience.
They think they are cleaver by charging $70 per ticket, and then hitting you with $100 fees for carry-ons at the gate, but their dishonest and unethical business practices have guaranteed that they will never see another dime of my money.