I got a set of size 205/60R16 in October 2017 for our Nissan LEAF, so I have a couple winters of experience, although my wife is the primary driver, so I can't say too much. In addition, we really only take it around town, so I can't comment as much on longer highway drives. Also as background, my only other experience with winter tires is with Firestone Winterforce tires, so nothing high end. The LEAF averages about 7,000mi per year, so I haven't bothered tracking the tread wear, they'll likely age out before they wear out.
With all that said I'd buy them again. Never got stuck, even in the taller snow (I can only remember maybe two significant snow accumulation events in the last couple years here in Chicago). The tires are much quieter than the Winterforce (not a difficult accomplishment). We're still using the OEM 17" Michelins during the warmer season and I feel that the Altimax Arctic 12s are noticeably smoother over bumps, but that's probably more attributable to the taller side wall.
I wish I could offer more insight into the tire's performance. I purchased these tires for the value. Living in the city, we could really get by without winter tires (and have for many years), so I just wanted winter tires for the extra safety factor, and because of that, I didn't want to pay a premium for high end tires. I bought them under the assumption that they'd at least be as good as the Altimax Arctic that it replaced. They're more than good enough for our use.