They are a light, fast dry weather tyre, they are not an all round tyre, but thats how i use my rear at the moment, road, race, training, technical off road, snow and mud etc
Used a couple for over a year. Was perfect at SPAM & Recently raced with a 2.1 on the rear at gorrick yatley (prety muddy) and it was not too bad, slip n slide but stayed on my feet.
I can control the rear but defintley cant get on with them on the front, they also corner poorly like the NN imo.
They also have a fast wear rate and not that durable.
The non ust also work ok tubeless but dont run them too low psi (like proper ust) or the walls will get destroyed quicker than the tread and be even shiter in corners.
its a love/hate tyre, all in my very non pro opinion of course