I'm a grade 8 adult player who was finding that I just couldn't get the sound I wanted when I played. And my hands looked like spiders, they were horrible. Despite studying hard, I'd never had technique taught to me. I also had an old wrist injury that would bother me if I played too long. So I tried a number of teachers, including a famous teacher who gives Master classes online. He actually noted that Taubman technique dovetails with most advanced technique in essence. The Taubman teachers were teaching me beginner technique, saying not to use my wrist, just the whole forearm, and other teachers were teaching me Russian technique and encouraging the use of the wrist.
In the end, I decided to study with a Taubman teacher because I wanted to go right back to basics. And I was curious. I'm on my second month, just beginning on the rotations, and already I can HEAR a difference. Albeit I'm only playing single notes, but I finally understand the principle behind all piano technique: your fingers are the firm supporting architecture, and the weight comes from the forearm (my words, not Taubman). I'll continue in this vein for a while. Not sure if I want to spend years working this way, we'll see. However, it's great for getting the tension out of my hands. It's not for everyone. However, if you're patient, injured, willing to start over from scratch (not playing your old pieces at all for a while), and interested in the physicality of playing better, try it.