I downloaded this because I'd been sent a .dwg file by someone who had done some design work for me. It was the second thing I tried, because google suggested something else first that wouldn't even open the file. iCADMac installed easily & loaded the file with no problems. After a little bit of understanding the few bits I needed to look at the file, I found it easy & somewhat intuitive to use. Although my use of it is shallow, I think it'