I'd only recommend this game to people who loved it back then more than 10 years ago; as comparing this game to current MMORPG standards - it just fails in many aspects.
~Deep and plenty of customizations on how you build your characters
~Tons of content to explore, unlock, and enjoy
~Well done sprites that still looks awesome even after 10 years
~Outdated gameplay - compared to today's standards, RO is grindy, repetitive, and stale
~Unforgiving character customization - it's easy to screw up your character if you do not understand how to build your skills and stats
~Still tons of botters - 10 years and maps and dungeons are still infested with gold farming bots
~Laggy servers - it says "International" but if you're playing anywhere outside the US, it's gonna be a laggy mess
~If you loved it back then and don't mind the current problems it has then go try it out - even if just for the sake of nostalgia.
~If you haven't played RO before, and are looking for an F2P MMORPG, then skip this one and try one of the many, modern (and much better) MMORPGs out there.