Product review (5 stars): Kit is complete and cheap!!
It was plenty of line for me and installed so very easy (my first time). I now have ice in my new refrigerator. Look at other reviews for details of installation as I did and you will not need a plumber at all (unless you don't want the task of installing in a dirty crawl space as I did in an almost 100 year old single level home). Make sure you measure the distance of your tubing first to be sure 25 feet is long enough. On second thought, there is probably an insert to stick in this type of tubing to extend the distance by purchasing only the tubing from your local hardware store (e.g. Lowes, Home Depot).