Moaner

This electrode is easy to insert, fits well, stays in place, connects well to the cable (and stays connected), and is large enough to make good contact. It's easy to insert AND remove!

It's also easy to clean and dry, and the container for it works well to keep it from getting scratched. FWIW: An ear swab helps to dry out the 4mm sockets.

This is my first bi-polar electrode, and the "ghost-sex" effect is pretty pronounced with it. The weight feels nice, too.