I have used forte' for over 10 years now, and have to say the product is 1st class. We put treatments (engine flush and fuel treatment) in every type of service (we have 3 levels) and have never had a complaint. we have never even asked permission, as it is part of the 1st class service that my garage offers. When the customer pays, we always explain the benefits of using forte' lubricants, the customer is always happy especially when they feel the results.
I am a member of the Good Garage Scheme, and so far i feel it is going well, i am still waiting for the benefits from the advertising but also feel that i am helping a cause that is helping me.