Gusztáv is the King of Quality Assurance in Software Development. Doesn’t it tell you everything? If not, I can add, that I have recruited Gusztáv to one of his early employments, where he had written the engine of a brand new product, which has thrived ever since. The guys I interviewed much later and who worked at the same company appraised his code as genuine quality rarely seen anywhere. Besides, Gusztáv is a great friend, reliable and open.