Tread pattern on this tire is directional, so 2 are being used on rear axle only. Car is a fairly heavy rwd with a limited slip diff, so the tires get some help. Grip is good in snow. Tires are composed when powered through rutted, hilly b-roads. Tires can be composed when navigating uphill on snow-covered roads.
However, it seems the Wi31 have a tendency to allow snap oversteer when approaching WoT. The slide itself is predictable and possible to reel in.
In general: grip levels are good, but once lost, the tire struggles to respond under continued throttle.
No comment on ice as there are no studs installed on the tires. Wear is noticeable outside of snow. Comfort is not an issue, nor is it a real strength.
This (Wintercraft Wi31) is a fairly old model, and you should be able to find discounts. It's important to make sure you check the manufacture year of your tire (XXYY) -> XX = week of manufacture, YY = year of manufacture. You may not want a "new" tire that is in reality a year or two old, since it means it sat in a warehouse in unknown conditions for a long time!