Just returned from trip-flew Allegiant from Springfield, MO to Orlando Sanford. Found it to be exactly what was stated. No frills, good friendly service--no problems. I am not a seasoned flier, however, someone in our group who has flown several airlines--inlcuding some smaller ones said it was great. (said it beat American Eagle by far). Our jet was an MD 80 something with about 150 passengers I think. Both legs were almost full. It was a 2 seat on one side, 3 on the other. Had no problems getting all of our party seats together, even though we didnt pay the extra to reserve certain seats.
Flew into Orlando Sanford which seemed to be a great little airport. Very easy in and out of, very easy to get and return rental--absolutely no problems there. It is a little futher out than the big Orlando airport but not by much. I didnt realize how far out the big Orlando airport was. very easy comute to and from Orlando via the toll road. Booked a rental when we bougth tickets and found that to be very reasonable. Got to go and look and have our pick at a van.
I would definitely do this airline again--no problems what so ever. Cant say I just love flying, but it beats the heck out of driving that far.