Our current viewpoint on the matter (for what its worth)

The M05 is NEWER and it is DIFFERENT - that doesn't necessarily mean that it's BETTER.

We've held off from doing a full comparison and review yet because at the moment we cant get an M05 within a second of our best M03 times.
That's not to say that it isn't possible, just that we havent been able to do it yet.

So we'll be holding off on a full review/comparo until we have more time with the car.

Bear in mind however, that down here in Aus we run the Hobbywing systems in our cars, and because we're going quite a bit faster than the silver cans used elsewhere, we're probably encountering issues that others may not necessarily have seen yet.