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.
A pause from Barbarian's Guild to share correct from yesteryear:
Today is: 28th February (GMT), in history on the 28th of February, 1932 AD the following birth happened:
Brian Moore: British commentator (Big Match)