It has never caused any crashes with CAD. Runs pretty quick.

Managing DWG format files without any cost is what DWG is all about, you can edit, view, and even print 2D and 3D drawings with ease. In addition, you can work with multiple formats, such as PDF to Word, Excel, HTML, PNG, TXT, etc. It is a lightweight software that is capable of handling a number of formats at once.

I can easily open large cad file without downloading big size software. very simple tool.all file from fusion360,solidworks,autocad file esily open in this viewer.