Installation per the instructions was flawless on MarshMallow using CM13 (and supposedly other MM AOSP based ROMS) on both Samsung Galaxy S3 (1280x720) and LG GTab 8.3 (1920 x 1200).
One interesting finding: there were no write-access issues when the external SD card was formatted in NTFS and defined as portable storage in MM, thus no need for a secondary root on the internal storage. This may be due to the enhanced security capabilities of NTFS.

On Android MM, the Galaxy S3 ran a 2100km trip run in simulation mode without crash using only 80MB of RAM with TMC on, which is great since the S3 has only 1GB of memory (no specific cache, max_memory or reserve_memory settings in sys.txt). My official iGo version (about 2 years old), run on KitKat would have crashed at least 5 times and consumed 4x the memory... Maybe time for an upgrade...
Ewald.