I would describe the flavour as high fantasy with a non germano-celtic origin story, incorporating elements of of sci fi and lost tech if the GM wishes to use it.
I'm a player, not a game master, but those are the elements that appealed to me, along with 'not another Tolkien clone'. And yes, I play MERP too and love it. But given how many fantasy games are ultimately Tolkien rip offs, it was lovely to discover a setting that has a fantastic rich background that doesn't have sterotypical elves and dwarves and halflings.