I've been playing around with the support material generation and I have a few comments/suggestions:
1) The effect of the "Horizontal Grid Spacing" is far less than intuitive. It changes both the spacing and the width/thickness of the supports in a way that I can't understand.
It would make much more sense to have a grid spacing and a width and thickness settings.
2) The "Support Generation" dialog should always stay on top. As it is, the dialog goes to the background as soon as I bring the main window into focus.
3) There seems to be no way to save a model with support. If I save everything and close the program, all support disappears when the factory file/model is reopened.
This is pretty frustrating after having spent some time placing support material.
4) The support material often doesn't print properly after having manually modified things.