Excellent and (still) works like a charm after some minor adjustments in settings (Security and Interface).

Yes, I can agree with former users about how the new update reduced the quality as well as lead to some errors. However, after I visited their homepage and follow the instructions in order to install it correctly (https://www.kee.pm/) it worked as it used to do. The update caused some problem and before I reinstalled it and followed the instructions to the letter, didn't sync with Firefox.

Verdict: They still deserve 5/5 for an excellent job.
However, having to install the "Install KeePassRPC.plgx plugin" after the main installation is one unnecessary step which could be included in the installation pack.