I have OnyxTree and it does make amazing trees. I use the Treestorm function for animating trees in Electric Image Animation System. Right now I am using it for my demoreel. The trees are highly editable and as detailed as you want them to be- and yes the tool is expensive. If all you need are non animated realistic trees - I also sell a whole bundle of them for Bryce5 here at renderosity - both pines and broadleaves. Check out the b5TreeFarm in my store. Scott