This is a great heavy duty boot. The quality is top notch, from the leather, sole, and shoestrings, to the stitching and goretex lining. I call them heavy duty because they are heavy and durable. They will protect your feet from water just as much as they will from a twisted ankle or a falling rock. If you are looking for a light boot made for running or agility, I would not suggest these boots as the perfect fit. More pros: they are truly waterproof. I have had other "waterproof" hiking boots that are waterproof for the first 10 minutes in water, but after the waterproof spray coating wears off, they are as porous as my running shoes. The sentinels don't let water in at all. The quality leather and goretex lining are double protection. You can also add a third layer of protection by adding any type of wax to the leather. I probably have 30 or more miles of hiking and more of everyday use on these boots. My feet have never been wet. They also have formed to my feet pretty well. It's almost as if the leather has molded to my feet. And the most important thing for me when buying these boots is that they are made in the USA, Michigan to be exact. If anything ever goes wrong with them, I am confident that I can send them to Michigan to be repaired or just take them to any boot/shoe smith in the local area. I got a high quality boot, for a fair price, while supporting my friends, family, neighbors, and fellow Americans.