I went through two sets of rain-x blades on my F-150 that I had trouble with surprisingly. I had them replaced for free the first time and the next set did the same thing (it was a dry year and not sure if that caused the issue). For the cost I was disappointed.
I do however swear by rain-x for all my glass windows!! Mud, snow, and water won't stick to your window and the driving visibility in hard rains is 1000 times better! IMO with regular application of rain-x (liquid) to the glass as needed the inexpensive blades work just as well as the rain-x blades and last just as long.