Hi Juggernaught,
I have Dark Dynamix. I only use the simple functionality at the moment as my projects are still in their simple stages.
I will say that the collision system is very nice, combined with the character controller it is very easy to implement things like obstacles and stairs. I have done some playing around with dynamic objects and they seem pretty nice too and I must say I can get more dynamic objects on screen than i would have expected (on a semi-powerful laptop)
there are soft body objects, I havn't played with them yet
there is cloth, I havn't played with it yet outside of the demo which seems pretty cool
you can implement force fields which you could use for wind and explosions.
the particle system is pretty nifty too which are dynamic objects so the force fields will affect them.
Like I say, I have only really experimented heavily with the collision and character controller aspects of this plugin.
I just see that you are having little luck getting user reviews so I share my limited experience.
I think its a great plugin.
Sometimes I like to use words out of contents