When i bought my DC2R it had a Apexi SAFC and Field FC. The Field was used to alter VTEC crossover.
The crossover was set to 4500. I changed the crossover to 5600rpm and it made a whole world of difference. I am not someone that usually can feel the difference in power from a small mod, like new pod air filter etc. But changing the crossover to stock bought a smile to my face.
I have actually now made some money, sold the SAFC and the Field and gone back to stock. Piggy backs not worth it.