great in the rain, not so much in the winter though.
funny story... a friend of mine locked his keys in his jeep. he suggested we make a slimjim but had no stips of metal. I looked at his wipers & said, "well there's a strip in your wiper". long story short... all we had was a pair of lineman's & one of his rain X wipers. I popped that door in 2 minutes