Things I liked:Custom made/ fit for Walther PPK.
Easy to adjust once installed
Great visual aid for aiming at your target
Things I would have changed:Instructions need to be a lot more detailed. What others should know:Instructions mention nothing about the fact that when you remove the old trigger guard pressure is relieved on a spring that holds the magazine release button in place - in which case it is possible for the button to pop loose when pressure on the spring is released. If the button pops loose you must be careful to reposition it while compressing the spring with the rear of the new trigger guard that is incorporated as part of the sight, before inserting the trigger guard screw.