I have both GibbsCam and BobCad V23. BobCad has to me the most cumbersom software I have ever used. Yes, it's cheap, but by the time you pay for the software, pay for training, pay for tech support, there are a lot of other CAM software packages thay will do as good a job for a lot less money.
Watch some posts on other sites and see why BobCad has earned the nickname BobCrap.
I use my GibbsCam to program my Tormach PCNC1100. My thinking is, I have $18,000.00 invested in my GibbsCam. I may as well use what I have.