Instruct: Classify a given Amazon review as either positive or negative.
Query: Hard to find, perfect replacement flap for our old pet door

I searched at length for a replacement flap for our old pet door to no avail. It seems that the newer doors have different dimensions than our old one (from '95). I never thought to look on Amazon but am glad I did because I found the exact replacement for my pet door which had been discontinued.Installation was pretty easy, but make sure you have it facing the right way. It is a little confusing because it seems at first it should go the wrong way. The directions that come with it are not very helpful. I would suggest taking a picture of the old one, front and back, before you take it off, that will help when you install the new one.