I have used the eval version of Estl cam for awhile, but I just can not reccomend it beyond a basic basic starter program.
The issue I have is that it introduces random errors in the job ruining parts. At forst I thought it was mechanical, but when the same error repeats itself running the job a second time, I know it is in the software.
It will cut dxf files ok for the most part. However any complicated mesh stl file ends having the machine plow thru the material in unwanted places.
I have attempted to machine a Karambit knife using Estl cam several times without success, however the same file will convert and run using other programs.