I'm brand new to machine embroidery and digitizing, and I found SophieSew and downloaded it. I've tried it out on a design. It's really easy to use, and works really well, except for the random bugs. Definitely save often. I learned that the hard way. to delete a single bone, like an outline, just right click on it, then click delete.
The only thing I don't like about it right now that I didn't figure out until I was ready to output my design: It doesn't support my machine's format. I have a Babylock, and it doesn't output into .pes format