From an apple standards perspective I can only truly complain about the odd choice of packaging. Where most application drop their 'library' inside the package or in (~)/Library/Application Support/... BrickSmith is pacakaged with its' own folder containing the application package, some example documents and the LDraw Library.
However, after downloading some extra parts for my MindStorms Educational set, I happily began documenting my latest invention. It's deceptively easy and intensely satisfying to see my MindStorms HotRod coming back on screen, with steps so that in a distant future I might actually rebuild it! I had not expected it could be this easy to use a 3D modeling tool for Lego...
P.S. There's even some usefull info in the help-section, for instance: a list of shortcuts! Not everyday somebody thinks of such a useful addition to the help-catalog!