It was our impression from viewing the video that this technique is very dependent on the dentist's skill in performing the needed steps (more so than with conventional construction, primarily due to time constraints needed to accomplish certain steps, and accomplish them the first time, properly, before the denture materials set). So in that regard, likely the dentist who fabricated your mother's denture is due as much credit as the system itself.
Stability is the principle that describes how well the denture base is prevented from moving in a horizontal plane, and thus sliding from side to side or front to back. The more the denture base (pink material) is in smooth and continuous contact with the edentulous ridge (the hill upon which the teeth used to reside, but now only residual alveolar bone with overlying mucosa), the better the stability. Of course, the higher and broader the ridge, the better the stability will be, but this is usually a result of patient anatomy, barring surgical intervention (bone grafts, etc.).
Review: My own experience with Todd Young has been that he does care about results and about how his work affects me as a patient. I have some pre-existing medical conditions that made fitting me with dentures very challenging and Todd has shown himself to be a perfectionist in his effort to get my dentures ”just right” and working for me. He and his staff have explained every step of the process and answered any questions I’ve had. In addition, I’ve seen Todd go above and beyond what I had expected, especially in terms of dealing with a difficult surgery I’d undergone at another dental practice — he did his best to correct a situation that he had nothing to do with creating! I wasn’t expecting that kind of support and both my wife and I are very grateful to Todd for his help. And his staff are certainly friendly and courteous. It’s hard for me to believe that the negative reviews posted here aren’t just from someone who has to have some complaint about anything and everything. I can say that in the many visits I’ve made to Todd because of my special fitting needs, I have never heard another customer complain about ANYTHING they experienced with Todd and his staff.