The bio-friendly qualities of this line fall in step with lead-free weights and jigheads. In my opinion, while using non-lead weights has merit, it can change the way you fish. I'm sorry, but a 00 tin split-shot does not sink like a 00 lead split-shot. Does it mean they're no good? No, but it means compensating in ways that could affect fishing. For example, adding more shot to a fly leader could change presentation, or stepping up to a larger jighead could alter lure action. As far as Bioline is concerned, I am not going to respool all my outfits with it, partially because I wouldn't trust it with a trophy, and partially because I pride myself on taking extra care not to leave line laying around in the first place.