You can have it on the windshield but the cam will be upside down. Just have to flip the video later in production. I like to pop it on the side-window. Either way, works great.

I tried my best, even with the extension, but couldnt get it to work on my front windshield! If i stick it to my side window, then i cant open it because the cam is on it and when i try to stick it on front windshield, it just doesnt work, i can't get...