I flew on Royal Jordanian a couple of years ago from New Delhi to Amman (A310) and then Amman-Amsterdam-Chicago (L1011). Overall, it was a good experience. Their aircraft were well maintained inside. The food was not good, but no worse than international economy class food on U.S. carriers. The flight crews were decent and seemed proud to be working for the company.
My favorite part of the trip was my 4 hour stopover in Amman..I just love Royal Jordanian's paint scheme! It's gorgeous..and to see so many in one place was fantastic.