I have been running this since May this year and installing it was a frustrating combination of reading between the lines in the installation instructions and the various posts and a bit of lateral thinking.
I now have an installation guide that can be edited to give the desired configuration so that the required steps can be copied and pasted straight into the Linux shell to be executed.
On the whole, I would say that it OK but it is frustratingly slow on my Pi 3B, with 3D view being almost unusable and there are a lot of anomalies in the aircraft data.
I only kept it because the Pi isn’t doing anything else and for the statistics, which I think is its best feature.