I don't have these on my guitar. I had to improvise and made the markings (with white tape) on the side of the fingerboard at 3rd, 5th and 7th fret. It's a special removable tape that will not leave any trace.
I am not quite used yet to the guitar's upper positions.
I almost forgot about them on the mandolin.. I have been playing for 5 years. I now go all the way up the fret board. sometimes I get lost and look for the dots
I never though they existed on any instruments when I played the violin 25 years ago
I guess after a while I'll forget about them on the guitar as well.
Looking for your opinions on this