I installed two a couple of weeks ago. To me, it would be perfect if you could raise & lower without opening the door... but, since all RVs have the screen inside the door that isn't really possible. Otherwise, I think it is fantastic! My wife, who thinks I spend too much on add-ons, loved the new windows & shades in the doors. On the other hand... I have two regular obscured glass windows available at a great price.
The key for removing and installing the window frame and glass is using tape to hold things in place. The dark tint on the SlimShade glass matches my existing windows perfectly. The last picture is looking through the tinted glass-- unfortunately, not much of a view inside my storage building.
I installed by myself in about an hour. The photo below of the old window being removed shows the window taped to the frame and the frame taped to the door. The same thing is necessary for putting in the new window. That's the key bit that is really important on the installation.