Had to wait a long time to get my hands on one of these, but it was certainly worthwhile. I paired it with a Marshall MR1960 B cab.
The amp produces sparkling clean sound, I really cannot stress this enough. Most people rightfully so associate these amps with high gain music due to its many ambassadors throughout the years, but I do think that this amp really excels in the clean and crunch spectrum.
That said, paired with the right boost/overdrive pedal at the front of the high gain input with the pre amp on 10 and the right guitar pickups; it turns into a high gain amp with impeccable sound clarity and modern sound.
When I am using the amp as a pedal platform I always use the low input and it works perfectly with fuzz pedals.
The only downside is the effects loop, it is noisy and it thins the amps sound. Did not find a solution to this at any volume (other than isolate it with the provided switch at the back side of the amp). If the effects loop is not a priority for you, then this is a 5 star amp! One would expect though that Marshall would have already sorted this out.