I used Xpress with the export to do solids for Bobcad CAD/CAM software. Worked great. I now use the full version and even happier. Looking forward to getting sheetmetal this year if I'm allowed.
Alibre Xpress is the best value with added export module I have seen. The Free Xpress and $99 for the import/export makes a great translation program if nothing else. We were looking into buying just a file translator and it would have cost us almost $1000 for the features Xpress +$99 gave us and Xpress could create the solids as well.
I can not find a better value IMHO.
Alibre also has great deal every few months that are well worth the cost. Xpress will give 5 assembly parts and some of the advanced solids and 3D feature are an extra cost. Most addons to express are $199. These addons give advanced features like the full version but allows you to buy only what you need when you need it.