"I purchased this cat door for my laundry room door. I wanted to be able to close off the door to the laundry room since the litter box and cat food are both there. I had no trouble installing this cat door aside from the complications of having a hollow core door from the 80's. The instructions for the door were very helpful as was the paper cutout that allows you to trace a hole the shape of the door opening. I used a jig saw which did the job but was very messy. I would highly recommend taking the door off the hinges and doing this outside. I learned my lesson! However, the door works well. What I did was put duct tape around the inside so that no splinters or anything would scratch the cats as they went through. You can seal it up pretty well and then the door is ready to go. My cats took to it after a few days and I think it is a good value for the money and works well in our home."