Slic3r is an open source slicing program with the features you’d expect. The Prusa edition adds in some integration with Prusa printers to make program setup a bit easier.

UI

UI is pretty and works well for common tasks. There are some menus and advanced features that are inscrutable until you go through the documentation. You have to manually keep track of which tab you are in. Parts only show up in 3D and 2D tabs until they have been sliced, then you can see more in preview and layers tabs. Settings are nicely laid out across 3 tabs at the top.

Slicing

Everything works quickly and as expected.

Verdict

Good piece of software made better with printer integration. Easy things are easy and hard things are possible(once you read the docs).