We were looking for a replacement for Autosketch which we have used as a small business for a number of years, and is now not supported for Windows 7. Our requirements were for a simple package as we only produce occasional basic schematic drawings, and 2D floor plans.
This package is just the job. It can import and export Autocad files type DWG and DXF which is also useful. It could do with a tutorial, but if you have a basic knowledge of CAD software then you should be OK.