Well they certainly don't make 'em like they used to! It could be because they are very thin on this car to keep the weight down, but the Windscreens on these cars seem very fragile. We've just bought a car and unfortunately a stone hit the screen near the RH A pillar whilst on the motorway. This developed in to a small crack within about 10 minutes. The following morning it had grown to about 4 inches long. I have filled in the crack with some repair resin to prevent it getting bigger (it's now barely noticeable) and we will be having a new screen fitted asap. From reading on the web, it seems that these are quite common to crack. It was just a short journey in the car and I usually cover 20k miles a year in my cars which have never had this. Even the Gen 7 Celica my Wife owned for 11 years prior to this never had such an issue
I thought I'd report it on here so there is another 'log' of it. I found that 1 owner has had 3 screens already fitted! I know that Toyota are not admitting any fault yet but surely it is on their radar as a potential design fault.