After reading so much praise for Mari strings, I ordered a set of mediums and they recently arrived. I am posting this to add a contrairian view: on this guitar they are thoroughly disappointing.
I have been testing strings on my new (to me) Ruck and have clearly settled on LaBella 2001 Medium Hard. I tried EJ45, Ej45tt, Cantiga Cristal, imperial Black, Classic Red, 520 red card, Hannabach 815sl, and Alliance medium.
Of those only the EJ45 set was a serious contender though the LaBella 2001 MH was the clear winner. But now I have put on the Mari and man was I shocked. These are the deadest, most uninspiring strings yet. Everything about them was bested by every other string I tried in all categories. Usually I would wait two weeks to let them develop but these are so “unspecial”
that I could not bear to start hating my new guitar for the two weeks it might take. Back to the 2001 MH. Same family, vastly different strings. Of course this applies only to my specific experience.