I tried getting through the winter on Continental's ExtremeContact DWS, but too often the minivan was sliding around. The ExtremeWinterContacts have a bunch more grip on snow covered roads. I ordered a set of 5 to use the fifth as a full-size spare, and the asymmetric tread pattern allows a full 5 tire rotation. I could probably have gone with the smaller base model Sienna 205/70R15 size, but the 215/65R15s handle quite well. Even the dry road handling is much better than the junky all-seasons that came with the van. This is the third winter season on them and there is still good traction. I ran them last weekend at an ice trial on a frozen lake, and they performed quite decently on the ice. They do seem to be wearing a bit quicker than other winter tires I've had, but some of that may be do to the Sienna being a larger vehicle.