There is a long thread on advrider about them. General consensus is they are average. Many report noise. I have Anakee 3 on now and many complain about them being loud, which I do not understand since everything about riding is loud and I wear foam ear plugs.
I have a set of Adventures ready to go on my bike, but have 1 more front A3 to mount and wear out first. Personally, I love the looks of the Adventure and have high hopes for good tread wear. The front could use a little more tread depth on the adventure so I expect the fronts will wear quicker than the rears, just like the A3s.
"If its not broke yet, it can still be fixed"