why entering the boogre caves? except for having fun...i got the sword of mavin and been to brimloch without visiting this place...just for any guild quest?

Yep, it's a side quest, and you can solve several guild quests, gain a few nice traits and just more xp and items.

Even though it comes so late in the game, if you want to get a Zenmaster, then, for a wonderful tome, to the Boogre caves you will go . Also very handy for the Lamp of Alibaba, the traits you get from the Bongo idol, and the quests for Band of Boars, and Grunaxe.

seems worth doing this...will go back to ishad'na and kill those boogres...