Inexpensive and excellent solution
Easily converts your old cabinets to soft close. No measuring. Some did go in slightly on an angle. The screw is big enough that it pulls the device away from the wall a tad while driving the screw in with a drill. But, they come out close enough. And, the adjustment works well for different weight doors. We have some with a glass panel that are heavier and needed a different adjustment. But, they really work. I installed them on frameless cabinets.