glad i had them today. bought a set 3 or 4 years ago, but hadn't needed them until today. during the winter, i keep them in the cab (in a bag) on the passenger floor section.
rain much of the day, and temperatures dropped down to about 31. the roads and ground are still frozen anyway, and the rain froze on contact. the dirt road was covered with about 1/8" of solid ice. i pulled to the side of the road, lifted the dump body, and put the chains on the outer rear wheels. i then drove in 1st low, which i usually only need when hauling a heavy load, and went down the fairly steep hill. only broke traction once, and it was the front that lost it, but i was able to power it through, and regained control. ran it the rest of the way down the hill at 2000 rpm, which worked better than idling down the hill.
got to the end of the dirt road, took 'em off and tossed 'em in the dump bed. drove the paved roads without incident. well worth the $200 investment.