I don't feel the Vornado Transom is securely held in place in the window.  During installation, after placing the Transom in place and before I was able to lower the window the Transom fell out of the window.  Luckily there was a roof just below which broke it's fall and I was able to grab the power cord and pull the Transom back in.  Vornado should correct this or stop selling Transom fans.     

I was hoping that something named Transom could be safely mounted on the upper portion of the window like an actual transom.  The Vornado Transom cannot be mounted in the upper portion of the window.

The foam inserts did not completely fill in the gaps between the window frame and the window.