The "IceDozer Plus" purports to be more than just a flimsy ice scraper, capable of removing tenacious ice with a minimum of effort. Its main gimmick are "carbide style Tenderizers™" on one side of the scraper, which when smashed down into the ice, crack the ice without scratching your windows. The loosened ice scrapes apart more easily using the traditional blade on the other side. There's even a mini "Pocket Dozer" that slides out from the IceDozer Plus that can be used for mirrors or any other oddly-shaped bits of glass.
I haven't scraped ice off a car window in over half a decade, but I used to loathe it. Dropping a $20 on IceDozer Plus—if it works—still intrigues me. I mean, it's yellow. Everybody knows yellow things are tough.
My worst ice scraping experience? I had this old Ford minivan that my mom gave me, the ones that looked vaguely like shuttlecraft. Aerostar, I think. It had ridges along the top, presumably to better sluice rain off the back while driving.
We had a big ice storm one year. A sheet of ice, probably four inches thick, had built up on the top of the van. Enough that I was worried about it coming off when I was driving down the highway to work. It could have killed someone.
I hammered the top of the ice with my fists for a few minutes, when it finally cracked in two. It was then I realized I was parked on a slope. The ridges on the top of the van, now ice-filled, guided the sheet off the roof and down the windshield, shearing off the entire wiper assembly.
From then on, every time it rained, I had to pull over. Preferably under an overpass watching the rain as semis blew past. I loved that van.