Yeah it's actually a very nice hammer. Most hammers lose a little weight by adding nylon set screws, but the KAPP hammer is actually heavier than most other hammers. It also comes with a nice polished square hammer lug. The only thing it lacks is a dimple in the front.
However, I wouldn't spend the money on the Eclipse/Belsales valve. They are basically just stock valves. The Palmer LT valve is around the same price and will give you a lot more performance. Even the ANS valve is better than the Belsales.