Jim, thank you for the glowing review of Mongo. He is happy and so am I
Rhodium is your bipolar cousin that you love when all is well and not so much when off meds. Once it get "there" it can be revelatory, but it is a PITA waiting on it.
One of the things Mongo does best is "speed"... leading edges of transients that are immediate, explosive and somewhat unexpected from many cables.
Bass response is very much different from some others. "Tight" only tells half of the story. Inner detail (pitch definition, 'air' and accurate release) is very, very good as you have found.
Your review was unexpected and greatly appreciated!