I have one that came with my Core. I've only used it once so far in a treed area of my local park. It performed okay on that one outing, but I haven't used it enough to compare performance to the other coils. I do like the size and balance of it. Gregg has some ghost town experience with it. Hopefully he will chime in.

Minelab Equinox 800, Nokta Fors Core, Garrett Carrot