I made 3000 miles with this tire. My wife drives this car, but I use it when we go to ski together. I went from 235/50 R18 which is OEM for SEL model to 215/65 R16 for winter. It was good decision. I went with this tire, because I wanted hardcore winter tire for this car. My VW CC is equipped with Bridgestone LM-60 (and they perform extremely well).
Anyway, on Tiguan, due to the AWD, these tires are just going forward with gusto. So far no issues, driving on snow packed roads, went through 3ft of snow: no issue!
If you need tire to go to ski, for lot of snow, ice, slush: this is tire for you.
Be aware: This tire is extremely soft, which is good for ice, snow. However, if you live in states where there is no much snow, but have black ice, maybe Michelin X Ice 3 would be better, since it has better dry capabilities. WS 70 is good tire, but on dry you can feel all that softness.