Priscilla, my ticket price was less than the total Regent air, which for us would have included a deviation fee since we want to go in a couple days early. We did have to pay extra for the upgrade, but I knew that before I called. If you consider the transfers, though, and you don't do a deviation fee--Regent Air is a better deal.
Don't worry about the airline calling you at your home regarding the return flight. Why would they do that when you're not there? And Maria's right-they have no-shows all the time for every one of their flights-they'd have to have an army of people to call if they tried to call everyone that didn't show up. Also, when you buy the ticket, they ask for a phone number in Nice, or wherever you are in case they want to contact you about the return flight--so in the rare circumstance that they would actually try to call you it would be at the number in Nice, not at your home. Make your return date on the date that the ticket is least expensive--believe me, they aren't going to try to call you.
Don--here's what's interesting about the one way ticket from FLL. If you are going from FLL to DFW (which is what we want to do) the price is $149 (it still is--I just checked). But if you're going one way the other way --from DFW to FLL--the price is $449. Go figure!!!