My favourite is the original Korda hybrid. This stuff made a difference to my fishing when I switched to it, but like has happened with so many other great products, the company discontinue it in favour of a new product.
I am down to the last couple of feet of this stuff and over the last 2years I have been trying loads of other links, cortex, Jel-e-wire etc and have noticed that the catch rate with these is reduced.
For spot fishing it has to be hybrid links I have in the box, but try to preserve it by using the Jel-e-wire when chucking into the unknown and fishing silt patches.