I have just replaced regular stock on my SAKO TRG-42 with KRG GEN 3
The first thing I noticed is improved hold without sand bag in prone position. Looks like the stock is heavier and pushes the hand harder to the ground. I do not even see much pulse in the scope anymore @25x. The pulse was mostly coming from my left hand. I had to use heavy leather glove to reduce it. Now it's almost gone.
Another thing I like is the pistol grip. I had hard time to avoid lateral pressure to the left while pulling the trigger with original TRG non-folding stock. This resulted in flyers to the right. Now it's gone. I hope for good
It also somewhat improved the balance of the rifle which is extremely front heavy.
You can easily replace cheek piece if you do not like it. I find it OK but some day I will try to replace it with something which fits better to my face.
I find the soft rubber butt is an improvement to the hold as well. In standing position it helps to keep front heavy gun in place (it has a lot of traction) and it also absorbs unwanted movements coming from the shoulder pocket in prone (it's very soft).
You can have your cheek piece as high as you want and still be able to remove the bolt without unscrewing anything.
Plastics looks different from TRG black finish (cheap) and the lines of the rifle are broken but who gives a damn about appearances? The stock looks weird on TRG and maybe some find it heavy but definitely is worth to try.
Be careful where you put your left hand. It can bite you a little bit under heavy recoil.
I though I will get more mobility with it but at the end I think I have got much more.
Disclaimer: I am no pro or even close to it. Shooting is my hobby, not a profession. These comments are not an advice or anything else. They are just a product of my boredom.