Need Advice: Window Replacement on New Car

Although I love my new Prius, things were not perfect with my dealership experience and I could use some advice on how to proceed. Here's the situation:

I found out after I had bought the car but before I took possession of it that it has several deep scratches on the windshield that apparently require that the windshield to be replaced. I certainly would have noticed these scratches had I of been able to test drive the vehicle, but I didn't b/c I was told it was out of gas. I had test driven the Prius on several occasions and since this was a new car, I did not extensively inspect it. You expect a new car is in pristine condition, right?

Anyway, the dealership ordered a new windshield from Toyota and has arranged for someone to install it. They say that this can take place at my house. Are there any special concerns I should have about having this work done? Can you really do a good job installing a windshield on a driveway? Is there anything I should ask for from the dealership? I want to make sure that this windshield holds up as well as the factory installed one. I've never replaced a windshield and to be doing so at <1000 miles is disconcerting.

BTW, the reason given for the scratches seem fishy to me. I was told they occurred when ice was being scraped off the windshield. The scratches are on the drivers side and are on a diagonal from upper right to bottom left. This isn't the direction ice I would scrape ice and also I can't imagine making such deep scratches with an ice scraper.

 

Ok, thanks for the reassurance. This is the first time I have bought a new car, so I just want to make sure that any work done is done correctly.

Besides this issue, I'm really happy with the car. I've been wanting one for years and I'm so glad I finally made the leap