The action and feedback is very similar to that of a real lock. Another great feature if you are a lock picking instructor this lock can be used by both left and right handed students. Additionally, the visual aspect of a clear lock makes it easier to see the pins. Even with a cutaway window looking at small brass pins in a brass frame can be difficult for some.
The one question that we get is what is the difference between a Clear Acrylic practice lock and a Brass cut away. A brass cutaway has a bit of a different feedback. With the brass pins on a brass shell the feedback that you feel in both the pick and in your fingers holding the shell is sharper. The clicks from picking are also a bit more natural to that of real lock. These differences are minor but as you gain experience you would notice them.