I've seen screenshots of people levelling in agility while doing barbarian fishing, but is it good exp for somebody that is 59 agility and 68 fishing, and is it better than normal agility courses, and what do i need to do it? thanks :D

It gives about 10% of Agility exp comparing to 100% Fishing exp. Say if you get 40K Fishing in an hour there, you'll get about 4K Agility and 4K Strength bonus exp. So it is not by any means faster than Agility courses but it a great way to fish!

 

Faster than any other fishing method and you also get agility and strength bonuses.