Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great and Cost-Effective

I've had these wiper blades installed for about 2.5 months so far and I have no complaints. They do a great job in providing a clear view when it's raining. They don't squeak when running across a dry windshield. The water beads up pretty well on the windshield after using them for a bit. We'll see how long they last.