Had MSP66 installed over 3 months ago, and roughly 1500 miles. Since then, it's improved shifting dramatically, which I never thought was really bad, but it did improve it, especially low speed. It also seemingly reduced the 5-6 hoot to nearly non-existent, as well as the supposed end all fix for the battery woes.
However, i've noticed now theres a discernable 'crunch, rattle' noise when accelerating at anything needing a touch of throttle. Like going up a mild hill or just accelerating from a stop normally - more familiarly sounds like a heat shield rattle, but it coexist with the update time wise. Far as I can tell from my own research it's the wet clutch as well as the enable/disablement of the electric motor for assist. As usual, very little clarification from the dealer and other resources. Car drives fine, better than fine actually. Really happy with it's operation now outside cold in-town performance, but that's just how it is in reality, which I understand.