Very comfortable. And sounds surprisingly good!

My son was studying at Center Stage Strings at the University of Michigan this summer and having neck and shoulder pain after so much playing. His teacher uses this rest and let him borrow it. It immediately made a difference so we ordered one and had it shipped to him. He played pain free for the next 2 weeks and still loves it! It was expensive, but worth every penny.

If you want to up your game to the next level, this is a great investment. I learned of this shoulder rest from my instructor, who is a professional musician. I am an IT professional who plays violin as a passionate amateur. I have a low end professional violin and bow (20-30K range). Here are the pros for this shoulder rest:
1. It significantly reduces the dampening effect of other shoulder rests, which for me has produced a significant improvement in tone of my violin, for me especially in clarity and quality of tone in the lower and upper registers.
2. It is self-conforming over time to the shape of your body.
3. It's significantly lighter than my previous bon musica adjustable shoulder rest.
4. I'm fairly tall and have a rather long neck. The height of this rest, combined with the Kreddle chin rest is the best height match for me for best ergonomics.
5. It's very beautiful.
6. I have a tension problem when I play, and frequently have pulled the previous shoulder rest off the instrument while playing. After playing for a few hours on the Korkfer rest, I got used to the rest and have concentrated on releasing the tension during play. It has not slipped off since I've gotten used to it
7. At this price point, vs. the next level at 1K for the Korfker cradle, while you don't get the order of magnitude improvement in tone, you still get about 5x improvement.

I purchased this shoulder rest several weeks ago. I have been playing the violin for 58 years. It is great in all areas. Very very comfortable.