weapon master bonuses stackable with featss, etc?

[Ahku]

Hello!

I cannot remember if the weapon masters bonuses are stackible with the following:

1) A KEEN weapon
2) The Improved Critical feat

I ask because i am thinking of forgoing the last 2 levels of weapon master in favor of the above.
BUT, if they DO stack - i will take those last 2 painful levels.

thanks,
~forgetful

[KOPOJIbPAKOB]

Keen weapon doesn't stack with Improved critical, although both these feats stack with Ki Critical.

[Ahku]

A heck...looks like i'm taking those last 2 painful levels ;-p

thanks for the feedback!