Apparently the super saver fare prices promoted by My Flight Search, are not fully reserved at the time of one first booking online. They do post online the fact that confirmation of one's booking is required by phone. They called us one day after our online booking to tell us the 2nd leg (stop) out on departure no longer has super saver fares. That added $223 cost to each ticket by them switching to an alternative Delta flight. Still it was a little cheaper booking through Priceline, Expedia and Airticket which were all over $600 for the same flight stops and dates. If you do not like messing around, best look elsewhere if you are in hurry or desperate.