Easy to use, cost-effective option

One of our customers requires periodic updating of existing layers on their DWG plans. Having used an earlier free version of DraftSight previously, I chose the paid version as a highly cost-effective alternative to AutoCAD. I'm not a power-user so can't compare it to all of AutoCAD's functionality, but for the relatively simple tasks that I need it for, it's really great. I found the learning curve to be easy, and the program and its commands quite logical and straightforward. And there don't seem to be any compatibility issues when the customer opens up the files in their version of AutoCAD.