Fran,
That's a good rate! I booked Allegiant for that a few weeks back for the same rate and glad I did (I am assuming that $69 is one way, if it is roundtrip, jump on it).
This summer will be the first time we will be flying with Allegiant (August 11-15 at AKL). If you visit the transportation forum on these boards, you will be able to find out a lot of good information on Allegiant. Overall, what I have read, seems positive. Now, you know, there are always exceptions. Flying into Sanford, you will have to decide on what type of transportation you will take to get to your resort (ME is not offered out of Sanford). We decided on a sedan limo service.
Sorry to hear about your bad experience with your last flight. If you decide to fly, I hope it will be better.