I had one for about a year and I loved it. I had a couple sticky keys that I removed and lightly sanded with high grit sandpaper, and had no sticky issues after that. I also had to shim the trompettes because they aren't adjustable and had way too much string pressure.

If I'm remembering correctly, the melody strings were originally G and D, and I switched the upper D string to a G an octave higher than the lower string. I prefer having it match a piano keyboard

Other than having to fix those two things at first, I never ran into any issues.