I think I am going to pick up a set of Blizzak WS70's for my Escape Titanium 19" option. I'll go with the 17" size. We are entering our 4th season on our Blizzaks for our mini van. This will be the last season with these tires. I think 4 seasons are pretty good for winter tires. I'll replace them with Blizzaks. I also heard the X-ice3 are excellent tires.
Where I live in Canada, we usually put the winters on in October and take them off at the end of March. But we have gotten snow in April, May, and June. Not enough to warrant winter tires though.