The interface has some clunky elements - you can't move the viewpoint without switching modes, for example - and it's lacking a lot of the bells and whistles of the bigger modellers. Yet, it does what I want it to, when surrounded by the right set of external utilities, and it's small and easy to learn. I've tried Hexagon, Pegasus, Cinema (several times) and now Blender, but inertia keeps me coming back to Anim8or. Fortunately, I only do modelling for fun and enjoy the process as much as the end result, so it doesn't matter if things aren't achieved with maximum efficiency.