I'm not much of an RPG gamer, but I played through Anachronox a few times and enjoyed every minute of it. I've heard that it compares to the FF series, but I've never played any of them- so I can't say for sure.
I will say that it is an epic game that will take some serious time to complete, the graphics are tolerable, and the storyline is pretty complex. My first time through the game, I got to the end with my characters a little on the weak side- never could finish, everybody died... my second time through, everyone was leveled up to the max and we kicked butt! The third time was just to explore the game fully, and it's a pretty big world with much to explore. I particularly enjoyed a certain mini-game that involves flying a rather sleek spacecraft into the hive... and that's all I'm gonna say about that...
So, I'll just link you to a review and you can decide for yourself -->
Anachronox review