My first 400 miles have seen a lot of snow. These tires have decent traction--the tires will dig the snow and propel you forward pretty well without invoking the traction control too much, as opposed to just spinning and struggling to move. In straight lines accelerating and braking, these tires are pretty good. I drove on a nasty, snow-covered Chicago expressway and felt confident. I merged lanes through a lot of messy snow without losing any control. These tires did pretty well on hard-packed rural roads too. In the snow, my primary complaint was turning corners and driving on on-ramps/off-ramps like a cloverleaf. It tended to push the car forward rather than navigate cleanly through the turn. You really have to watch that with these tires. Overall, I'd rate these tires as good in snow. Not great, but for an all-season tire the Cinturatos are above average.
On dry surfaces, I felt connected with the road, like the tires gripped really well. However, these are not the smoothest tires I've ever driven. They're better than the OE Bridgestone Turanza EL-400-02 tires that came on my car and these Cinturatos are as quiet as any tire I've experienced. The Cinturatos reduced the harshness on unsmooth surfaces the EL-400s really struggled with, and the Cinturatos go over pot holes and gaps surprisingly well, but you definitely feel bumps and ridges in the road surface. It can be a little unsettling on highways that have heaved a lot. These tires are good with regard to smoothness, but I expected more.
I have had minimal experience on wet surfaces at this point--always snow and ice or dry roads--so I really can't comment on that yet. Nor have I driven them enough to comment on treadwear.