I know that Hexagon has it's problems, but version 2.2 has been pretty stable for me. Yes, you still need to save your work and it can act up, but I have been using it as my main modeler for a couple of months. Once you learn ALL the tools and it's limitations and work-arounds, it's proven to be very productive for me. Now Boolean operations in any software are a big no no. They work on certain simple shapes, but never in complex ones. I am also on a Mac.