New windshield wipers

The local Jiffy Lube advised the wife that she needed new windshield wipers, so I went ahead and replaced them yesterday for her instead of paying Jiffy Lube to do such a simple task.  The wipers we bought were the Rain-X brand.  Today my wife was driving the car in the rain and she tells me that for the very first time ever she was actually able to see through the windshield during the rain without a lot of streaking!