This has to be one of the best ideas anyone has had. It turns your humbucker into 4 different pickups. I've tried it on a very cheap humbucker and it has got so much more interesting. I can't even imagine how this works with a better quality humbucker or with something like a prails. It's also very easy to install. Please note it needs your humbucker to have 4 wires, and it will turn it into a 2 wires one, so you will need to plan your circuit acordingly.