very happy with it and have had it for over 5 years now. I can outrun my brother's '93TT with JWT ECU and similiar mods. Everything I have read says that the DINAN ECU modifies the timing and fuel maps, raises the rev limiter just as the JWT ECU. I realize the maps may not be identical, but everyone thinks the DINAN ECU just raises the BOOST. Both ECUs are designed to provide proper fuel and timing maps up to 14psi. If you have facts that can prove otherwise please fill me in!!