I have made a few essential Presets for Lightroom that does minor adjustments to the Leica files, so as to get the tones the exact way I want.
The Presets has as their ideal, the Leica M9 sensor, as well as the Kodachrome film (which also happened to be the ideal for Leica when they developed the Leica M9 sensor). Not that it matters much, but that is the reason why I made my own Presets: To get the that look, rather than a “digital sensor look”.
"Overgaard Leica Presets"
Lightroom Presets Package
Lightroom CC Classic (7.4 -->)
Lightroom CC (version 1 through 7.2)
Lightroom CC (cloud-based 1.0)