My only complaints are the price and the unfinished ends. One of the ends looks like it was cut with a hot knife. It is rough and not smooth like the rest of the rest.
Nothing fancy,nothing complicated, just does what it's supposed to do, well.
Highly recommended, good stuff
the suction cups are too close together, so therefore it won't stick.
I like how I now have a thumb rest on my acoustic bass guitar. I'm not able to put it exactly were I want it as the sound hole rosetta is a sticker with raised edges. The suction cup doesn't work on it.
I dropped a star for the finish being somewhat poor on one end of the Thumb Fin. You can clearly see how it was printed on a 3D printer but time was not taken to sand down or polish the roughness of that off.