Not as pretty as mocked up, but it's functional. We hope to have the nicer version done for the next development cycle.
The button mapping will show you the actual keys, with translated names, for your device, instead of every possible combination of buttons which end up doing nothing.
We've also made a big number of layout changes and fixes, which means that the main window isn't as awkward as it used to be.
There are a number of features that unfortunately didn't make the cut, mostly due to the lack of support from the X.org drivers. Mode switching currently doesn't advertise the current mode by changing the LED, and the OLEDs that show the bindings for each key stand empty.