The damage bonus from this guild is invaluable. But another huge perk is that you get Bash level 15. This appears to greatly increase success with spellcasting in combat, as you have to bash your enemy away before casting.
We interrupt Barbarian's Guild to share philosophy from way back when:
Today is: 7th December (GMT), in history on the 7th of December, 1915 AD the following birth happened:
Brackett Hamilton Leigh [Douglass]: United States -- Sci-fi author (Ginger Star)