I have had the tri channel box fitted to my Mercedes c350 cdi for about a month now, I wanted to get some good use out of it before I reviewed it. I am very happy with the service I received from dtuk, helpful guys and not afraid to be bombarded with questions! The product was a little tricky to fit on the merc but I think this is because the engine bay is very cramped so there was a bit of fiddling around took me about an hour. The product is awesome! After trying the system on multiple settings I have settled on 1 +1 anything more than this will bring on engine management light. The car has so much torque it spins the back wheels at 40mph in the dry!! Dtuk states I should be getting 720nm and I do believe it. I bought a pedal box after a couple of weeks and love that too, took me 5 mins to fit