I have gradually come to believe that Mr Omobono is a sound judge, so I thought I'd try a Zyex A, D and G. I put them on yesterday. I am impressed: they immediately made a bigger positive difference than any other strings I have tried. Perhaps the impact of the change is amplified by the fact that the strings seem to need very little playing in: I put them on, left them to stretch for ten minutes and then they sounded excellent. Highly responsive, rich, complex sound.