I read all the reviews of these blades, and even though some folks had problems with them, I decided to take the plunge as they looked like they would work well in snow and ice. I installed them on my 94 Volvo 850, replacing a set of worn Bosch conventional wipers. The new blades will simply not work on this car. Although I've never had a problem with previous blades and the spring tension on both blades is very good, these new blades do not contact the windshield in the middle portion of the blade. The blades are so stiffly curved that much of the blade remains above the glass, leaving most of the windshield unwiped. Guess I'll put on my old Bosch conventional blades, which have very little curvature. I can't comment on the longevity of the blades as I can't use them.