Not quite as silent as the stock tires were, but very quiet overall IMO. Hell, the front tires are starting to cup quite a bit because I have not got an alignment yet after putting in the fox coilovers, and they are still hardly even audible.
We live in northern MI, so we get all the seasons. Snow, ice, sleet, rain, bare/dry roads...they have handled everything superbly. I dont take her MOM BUS out two tracking much so no review for dirt/mud, although Im sure they would work just fine. We went into this winter with almost 50k miles on the tires, and I figured I would have to put a new set on to get through the winter safely...still running them with no issues!
I definitely highly recommend them. They have been a great tire.