Well the verdict is in. We had our first snow fall in MN. After driving around, my wife feels that the stock tires on our SXP is inadequate. That is, it doesn't make her feel confident. We've had her in Blizzaks the last few cars.. Crosstrek and Prius. It's hard to go back once you've ridden on snow tires. She said the Carnival was squirly and there was a lot of slippage. So this weekend we are going to put some snows on the Carnival. I will drive it tonight and this weekend again to see how much difference there is. Based on my experience with Snow tires, it's going to make 100% difference. How much? I will know more once I drive it.