With physics, and salty mods is by far one of the more fun airliners in MSFS to fly. Every plane reuses some form of Asobo asset so I can't fault it there. There are also FT-SIM sounds avail. Most of the mods for CS77 are more well maintained than most payware which make this a valuable asset.
The plane has somewhat good fidelity but dear lord it's like the audio and controls have no correlation. Fix the sounds. It's been this way since day 1 and still not fixed - at this point we must assume you abandoned this "project".
It's a decent plane. I've had minor issues with the MFDs not working at the start of some flights. It sounds more like a rusty hair trimmer than a plane.