Well first off i have sold Kolbe for years now, people will have their opinions but i will put them a small notch below Marvin, very very good product just not there. As far as Centra i cannot offer an opinion as i had never heard of them until you posted their name. I have sold windows and doors for 20 plus years and it is odd in this day and age for me to have never heard of a major window brand so i will let you draw your own thoughts on that. Perhaps they are just a fairly local manufacturer, don't know but.....seeing there website and developments, track homes and condos would not lead me to believe the quality is there. Again just my opinion, plus they are vinyl