This is an excellent product. I don't rememeber how to spell the thing this is...that starts with an S...so I will just keep calling it a product (see picture to remember what it is, as drug dealers will talk about their product, and they don't mean this...and when I say "buy this product," I am not saying you are going to get a bunch of cocaine...really, coke's not that cheap). So, it's curved, but flexable so it really hugs your windshield, and if you want, if you really really want, you can use it on flat windows too. I bought this to keep in my STi (car), and it's perfect, much better than the stupid ones at gas stations. However, they will not give you a break on gas because you brought your own...don't even ask. I hope you like and vote for my review!!!