I have a Tikka T3X Compact 7mm-08 in a whatever-it's-called-green HNT26 folding model.
The quality is top notch. It was easy to install and fit perfectly. My rifle weighs 1 oz more with the HNT26 than with the original Tikka stock with the spacer for a longer length of pull. The folding mechanism locks up tight when open and closed. I don't feel like the chassis has any effect on accuracy, good or bad. It was even still sighted in after the install. I hunted everyday for a week with the HNT26 at the end of November. I found a few likes and dislikes.
Likes
Carbon fiber isn't too cold to the touch.
Folding stock is great for holding the rifle as a passenger in a vehicle.
I normally hunt with my rifle in a gunbearer on my pack, but this little rifle is so light and compact that I mostly carried it in one hand by gripping just in front of the 10 round magazine.
Speaking of the magazine, in my other rifle I usually carry 10 rounds, 4 in each magazine, one to load in the chamber and an extra for some reason. With a chassis I can carry all that in one magazine.
I also just like the way it looks.
Dislikes
It is a bit noisy when hitting brush. It's mostly the pistol grip that acts like a drum.
The open forestock tends to collect leaves, twigs and snow.
It can be a stretch to reach the safety and the scope covers from the pistol grip.
The folding stock is so fun to play with that I find myself messing with it instead of sitting quietly waiting for a deer.
I don't recommend getting one because I'm going to be hunting with mine for years and I want it to be the coolest rifle in hunting camp.