steinbauer for pathy 2006

I recently installed the steinb. chip on my pathy and it runs great, its installed directly in the injectors and the original connectors go to the wiring that go tho te chip, unlike the dtronic I had in my patrol. (which I think its easier)
the power is awsome and acceleration its impressive... lets see how long the engine lasts??? supposively steinbauer gives me guarantee that if the engine , drivetrain or transmission fails they will replace it(in spain where I purchased the chip they give this guarantee)
the only set back of this chip is that the exaust throws more black smoke if you floor the gas quickly , but when the transmission shifts the gears the smoke goes away( when rpms go down)
has anybody else installed a similar chip?
have they had any problems?