I've tried it and I don't really understand a lot of the mechanics yet, even having followed the tutorial and guide quests. It seems tedious for no reason.
As far as I know there isn't XP rate information that's confirmed yet, but my opinion is if they're going to release a skill like this into the game the XP should be easy to gain.
We don't need another expensive buyable skill that can cost you 4 billion gp getting to 99 like construction, and we definitely don't need another draining skill like runecrafting that can take you 400 hours of game play time to max.