These strings give a wonderful dark woody tone on my octave mando. I was also surprised that they gave a decently strong sound, as I found the Thomastik medium strings for regular mandolin to be a bit weak sounding on my Gibson A2. Not true for the OM strings, though!
The wound E string rings ever so slightly less with the Thomastiks than it did when I was using D'addario OM strings, but the overall sound is well worth it. I don't like having an overly metallic sound on the open bass strings, and the thomastiks don't give that at all. I think the tone of these strings is very compatible with Swedish music, but the sound would be compatible with any style of music. These sound significantly different than most other strings, but I am spoiled now and probably will stick with these as my main choice from now on, though I'd like to try the light and heavy ones, as well.
Also, I put them on weeks ago, and they still sound new. The smooth texture is very comfortable on the fingers, as well, and you don't get any squeaky sound when moving your fingers down the strings.
One thing worthy of note is that the G strings on this are pretty thick strings. They fit into the bridge and nut slots on my OM pretty well, but I am not sure if it might give other people issues and might require a bit of a widening of the slots.