The expectations for these pins where high and I'll tell you that they met all of them.
They make my guitar (Harley Benton CLD-30SCM-CE SolidWood) sound perfect.
The reason why I am able to make this review is because I have tested the sound before and after plugging in the pins.
Ie. I know how my guitar sounds with and without these pins.
The HB came delivered with plastic pins and to be honest the guitar sounded quite ok but not brilliant with that pin setup.
Once I switched the pins (to the Martins) the guitar immediately sounded like it got "healed from a cold" (symbolic language: as a human who recovers from a cold).
By that I mean that the guitar instantly sounded alot clearer - a very crucial & noticable difference.
Plastic pins really does dampen steel strings, dulling the sound. The synthetic ivory thing really works. I can honestly say I'm impressed.
There is no reason to not buy these pins.
Soft Cheap Plastic saddles and pins destroy the sound of all guitars.
It doesn't matter how good wood, setup & build you have in your guitar, Incorporating plastic dampens & dulls the clarity of sound.