We have got a free edu license. They were very helpful and cooperative. The tool seems to work well for Autodesk Inventor. It is similar to Grabcad, better in most regards, although there is a bit of a learning curve as there are more features.
One main feature that looks to be an upgrade is the check in/check out feature. People who want to edit a Part or Assembly need to check out the file. This makes it read only for everyone else in the project, while the person who has checked it out edits, then checks it in with the new changes. (TL;DR - prevents overwriting changes, at least in Inventor)
Migration of old files is also very easy. Bild tells you to designate a folder that will house your projects. You can select a folder with files already in it, let’s say your Grabcad folder.
They created an edu license for us via our school email address - the @company.com extension, so if you are an independent group, it might be harder.