I purchased two of the aluminum premium pet doors, The templates provided certainly helped with positioning the doors and provided an easy cutting guide. Two timber doors were cut with a electric powered jigsaw with minimal of trouble, the doors fitted into the cut outs without any issues, sealed around each pet door with silicon. The dogs only took about 10 minutes to figure them out and now use them freely, the flaps can be prone to being blown open in strong winds blowing directly at the door