Ok fella, I took a look here's your review.
First: technical exercises are dull. Simple. Liszt is said to have done them while reading a book. Call me closed-minded if you will, but someone who claims to have "fixed" this problem hasn't.
Here are some claims made on the site, with my comments in italics:
Practicing the intermediate, virtuoso, and advanced books together at the same time produces a unique synergism.
(All three at once huh? Gee, I can start right away on the virtuoso stuff, if I make sure I buy the other two books right away too. I'll get right on it. Here's my $75.)
There are no other piano technique books as comprehensive and effective.
(Really? I gotta see this for myself. Here's my $75.)
The exercises will do the work for you.
(Wow. I don't have to practice any more. Mom, can we stop paying the teacher and spend $75 on these here books that will take his place? You'll save money in the long run.)
You cannot fail.
(Sign me up! My $75 is on the way. It must be true; it costs more than Hanon after all.)
When you are playing Hanon you are using all five fingers, each of which have their own unique characteristics. You should not practice five-finger exercises when you are beginning to develop your technique. If you are practicing exercises using all five fingers with the Hanon exercises instead of beginning with two-note exercises, the weak fingers will stay weak and the fingers which have tension will remain tense. That is the problem with Hanon.
(Wow, you guys are smart. I used Hanon, and that did happen to me. Took me maybe five years to strengthen my fingers and get the tension out of my arms. And now you can save yourself that five years of practice by using the Tersun exercises, and get all that benefit without really working at it. After all, those exercises will do that work for you--they said it right here on the internet, didn't they--and all you need is $75. I guess five years of your time is worth $75, isn't it?)
The teaching of etudes without musical content becomes an activity of only moving the fingers, an athletic activity. Etudes such as these will dry up the imagination of both the teacher and the student.
(Yes, when that happens, it's the music's fault, not the performer's. Oh, and by the way, the Tersun Technical Exercises are musical masterpieces, every one a joy and delight to play.)
That is the problem with Czerny...The student should begin with the Twenty-Five Progressive Studies, Op. 100,by Friedrich Burgmuller. Later the Studies, Opp. 45, 46, 47, by Stephen Heller should be taken up.
(Of course, Czerny had the musical imagination of a bowl of oat bran as compared to Chopin--we know this because Chopin said so, or words to that effect. Now, Chopin most definitely spoke very highly of Burgmuller and Heller as compared to Czerny (even though they are even duller than oat bran really), although history remains silent on the assertion. We recommend them on Chopin's authority anyway; the fact that Czerny is bigger competition than they are doesn't have anything to do with it. Also--and this is important--because they are more obscure than Czerny, that proves that we know what we're talking about. And that means that we also know what we're talking about when we repeat that the Tersun Technical Exercises are musical masterpieces every one, a joy and a delight to play, even those two-finger ones at the beginning. We have solved the problem with Czerny! And, all that great music is available at only $75. Compare all those collections of 60's rock CD's that you see on late night TV, and you'll see what a bargain that is. Be sure you look for them on the radio...)
So there you go, there's your review. For whatever it's worth, pal, my advice is stick with Hanon, and stick with your teacher.