Spline Cleaner as a product has saved me tremendous amount of time. It is a powerful tool to clean splines from AutoCAD to MAX and allows me not only to edit them as Bezier curves where they were not on initial import. Also allows to clean number of vertices and optimize based on curves/straight runs to reduce the number intelligently. My only complaint is support. I already owned software and due to machine failure, I needed to reauthorize the code. After reaching out numerous times over months and no reply, my only choice was to spend another $30. Not very professional but I had a deadline to make.