I have stiff person syndrome so my muscles are always tight and painful. The LE3 has the 16mm stroke that I need to get deep in the muscle group to relieve the tension and pain. My only complaint is the posts where the motor attaches to break off after 6-8 months of use and the piston and bushing wears out in the time span. This won’t be an issue for regular users as I am extremely hard on the massager. For the money this thing is the best out there!