Been running them for a few days now. Not done anything off-road yet though. Noise does seem slightly (I really mean hardly noticeable) more. Certainly happy with it given how good I'm hoping they'll be off road. I trusted the decibel rating for an idea of noise - 71db - seemed pretty low. Certainly compared to a proper AT tyre. They are quite firm feeling - even at factory tyre pressures, but actually in quite a reassuring way. They look great too.
Actually I still haven't really tested them in anything too slippery or muddy - however I have put them through their paces on wet grassy slopes. Seemed fine although after a few passes on the same section they got overwhelmed and lost traction. From what I've hard though that is a very demanding surface for any tire. They seem to be a very tough tire thiugh - not showing much wear. Excellent on road.