I hadn't seen this post previously or I would have responded earlier.
I've been a Premium member of RST since January. I put in the reps and I have seen my swing aesthetically look a lot better. Unfortunately for me it hasn't resulted in lower scores; but it's a journey.
They have different specials throughout the year. I believe I got mine for $119/yr. Now, you get a swing review every 2 weeks included with that. So, it's nice to get a lesson every two weeks for essentially $5. Tough to beat that value. The instructors are good so I really have no complaints about the money.
My instructor started me on set-up, then on getting my weight over in my back swing, then on rotation. I'm certainly hitting the ball farther (I gained 20 yards on my irons) but I haven't gotten to the downswing or release yet, which is why my scores likely haven't improved yet.
A lot of the feels and movements are foreign to me so it definitely takes commitment to learn the motor movements and ingrain them, but it can certainly be done. Right now I'm learning how to "post-up", or push off the ground in order to release the club.
All in all, I like what they teach. You have to go in committed to doing the reps or you won't get anything out of it. I'll be signing up for another year when my membership is up.