Product review (4 stars): Ice Door Kit
The product works perfectly.  However, the previous reviews are 100% correct that the instructions are poor at best.  It could definitely use larger color pictures and better descriptions.  For example, there is a third tab near the two you have to break off.  I inadvertently broke the wrong one.  It turns out this tab is used to hold the pin for the hinge to the flapper door in place.  After it was reassembled, the flapper door kept falling out of place, much as it had done prior to the repair.  I managed to rig it with the use of a screw through the back to mimic the tab I inadvertently removed and that seems to have worked.  Again, good product, lousy documentation.