Absolutely fantastic, I was having major problems with my Lexus, had new dpf fitted and it was still pluming embarrassing vast amounts of smoke, constantly getting it taken off and cleaned!! Then Burnie came and sorted it all, so incredibly knowledgeable and genuine lovely guy!!! Would give 10 stars!! Saved me a fortune!! Now drives like a dream not a puff of smoke!! And so much better on fuel consumption!!!! My dad had his car done as well and he says it’s driving like a new car, it has power he didn’t know it had!!!! Also better on fuel consumption!! Really impressed!!!