We do use BOBCAD for most of our mold making and trimming molded parts. It fits our needs pretty well, but the CAD features are limited and not as intuitive as other software. The results are good and we haven't had any compatibility issues with Mach3 CNC software. The only catch to using BOBCAD is that you only get the most basic features and then they constantly try to sell you more than you may need and/or additional training and support. This may or may not be good for your company/needs. Generally the software is good and the support is great if you call often or pay for extra services. Overall I would say the value is high for fairly simple 3-D machining.