shift-c shows the mesh. but it has many holes, especially smaller triangles are missing. many of them.
some models however wont get converted at all. it doesnt even create an outputfile.
i already asked treeform on irc to have a look at it, and if possible make it work for visible geometry,too. since octrees can be a major speedup and allows generic map optimisation like ->flatenStrong->octree. which is usefull in many cases.