I've been taking a look at this over the last few days. Honestly, as free MMOs go RoM is actually quite playable. I haven't had a chance to check out the PvP yet but it's a WoW clone with some funky twists.
At level 10 you get to dual-class, and swap between the classes to level them. Skills are developed using training points which are awarded for kills, quest completion, and on level up. You have access to your secondary class' general skills while playing the primary.
Crafting and gathering seem well thought out, if a bit WoW-ish.
PvE is perhaps a trifle easy, but maybe it gets tougher at the high end. The game is eminently soloable in the early stages.
Graphics are pretty decent, if nothing earth-shattering. Music is a bit tinny.
They pay for the game using a pay-for-features model which, at least for now, seems not too limiting. For example, you start with two bags and the rest need to be 'rented'. Items can be upgraded using diamonds which are purchased using IRL funds, and so on.
If you're looking for a free game to pass time while waiting on another title, as I was, you could do a lot worse. But then there's also Combat Arms...