Sadly, without jumping to a 4-figure price point, this is the only Mac CAD software having a reasonable toolset. Unfortunately, it's also littered with many bugs and glitches, falls severely short on documentation, and crashes multiple times per day (when working on a drawing for several hours). When you end up spending two hours simply trying to create a glitch-free cover surface, or some other task which should take only a few moments but ends up taking hours while working around software issues, the frustration runs quite high. Save your own backups because you never know when this application will crash next, perhaps even while saving your file or while making a backup, and then you're screwed without Time Machine or a manual backup. Having already invested $400 in this software and past the learning curve, I've chosen to cope with its bugs, glitches, crashes, etc since most of the time I can get work done with it. Eventually I will be happy to ditch this crappy application in favor of something a lot more stable.