SOUND!
Although it is really hard to explain one person with one word, I believe "SOUND" is the best word that might explain Burak's business approach.
To further elaborate "SOUND", I am citing you some of what Roget's New Millennium™ Thesaurus, First Edition has to say for the adjective "SOUND"
firm, fit, hearty, intact, right, robust, safe, sane, solid, stable, sturdy, substantial, thorough, total, undecayed, vibrant, vigorous, virile, vital, well, well-constructed, whole, wholesome, wrapped tight, commonsensical, convincing, correct, exact, fair, intellectual, judicious, just, level-headed, profound, proper, rational, reasonable, reliable, responsible, right, sensible, solid, true, trustworthy, valid, well-founded, well-grounded, wise...
Emre Ersahin