Oh no, there is no guarantee of satisfaction. What they do: if you give them the order for the realisation of a larger system, they charge a proportion of the consultancy costs as a discount in kind. But they also tell you straight away: we don't have time to accept orders for them for the next two years. In other words: we have no intention of granting such a discount. In other words: we don't install anything, we only advise. Note: usually rather bad, due to lack of practice...