Gewa Armpad Classical Guitar KN

I bought the arm rest when I learned that you can increase by 20% the volume of your guitar because the right arm stops the top of the guitar from vibrating.
By placing the armrest the top of the guitar gives out a fuller sound.
The armrest didn't fit perfectly into my guitar, or at least I couldn't find a perfect fit but I found a good fit that makes the guitar look good and it stops my arm from touching the guitar top.
Conclusion: guitar armrests are good for volume and tone!

Despite "classical guitar" in the name, it is not for the classical guitar body. I've tried to match it with few classical guitars and this armpad doesn't fit with any of them.
So it maybe designed for folk/acoustic guitars, maybe jumbo, I don't know.

But after all, even with a small gap, it still serves its purpose and there's nothing much to add to it.