Not much of a review.. but at least there's pics of the M Sport on the track.
Full Review: AUTOEXPRESS UK 435I MSPORT REVIEW
Here's the driving review part:
We only had the chance to test the car on a smooth race circuit – so can’t be sure how the suspension tweaks effect the ride on UK roads – but considering how well cushioned the standard car is, the changes shouldn’t be drastic. What we can report, though, is that the M Sport model acquits itself extremely well when driven hard.
While the steering feels strangely light and artificial at low speeds and in Comfort mode, it comes alive when you toggle up into Sport+ , offering just the right amount of resistance and pin-point accuracy. There’s still a hint of body roll in fast turns, but once it’s settled on its springs it feels perfectly stable. Plus, like in all good BMWs, you can adjust your line using the throttle.
The six-cylinder engine is unchanged, so provides the same linear responses, smooth acceleration and muted growl from the exhausts. The eight-speed auto is also excellent in a huge variety of situations, but can be reluctant to shift down under heavy braking for a tight corner.