I use it as a spray solution and a supplement in the windshield washer fluid, and I am relatively satisfied with the cleanliness, but not so much with the shine it promises.

I put it in the car this summer and it really does a good job especially for small insects and pests e.g. mosquitoes...for 1€ per liter or less it is definitely worth it. I used half of it this year and I have the rest for next year...definitely much better than what they sell at gas stations

It was purchased for the removal of insects from the windshield during the summer months. After several evening trips with several insects stuck to the windshield, I can confidently say that it does its job perfectly. The product is ready to use, no further dilution is needed.