Does the job - but not great!
Solid, but not great. It feels like a bar port from a UNIX tool, not clean, modern. Worse: it didn’t support the latest DRM/file format from Amazon, only the iOS version did that. Bah!
That said: still much better than iBooks, which is extremely slow, unreliable, crashes often, picks somehow “random” filenames, etc.
PeteT1975 about Kindle Classic