Has anyone ever used Allegiant Air? If so, what are your opinions on it versus a larger airline? We have this offered to us just an hour from our home, versus driving 3 hours to fly a bigger airline. The cost for the four of us roundtrip departing Sunday and returning the following Sunday is just $597. We live 15+ hours away and have calculated our gas at a minimum of $450 (using $4.00/gal). We drive a large SUV. I do not like to fly at all and I'm a little uneasy flying on a smaller airline. I price checked Southwest and it was $1396 for the same days roundtrip. Yikes! Thanks for any help!