These have been great. If you are looking here, you'll be aware of Thomastik Infeld, the Austrian classical string maker of high regard. This is their take on roundwound bass guitar strings. In a sentence, Worth every penny. Great, natural clarity and punch, and the clearest I have ever heard my bass lines. Also, no real nasally zing from the strings, which you might expect with the tonal qualities mentioned.
In short, this is a quality string - from the purple silks, to the service longevity (12 months won't be a problem) and the tone. I will say though tat these operate at quite high tension. If you play ultra-quick lines, these might be a bit stiff. They certainly give my fingers a workout,