I think the single bloom of mine lasted more than 3 weeks. It's true the shape was better for the first days, but the bloom was stunning anyway for a while.
That's good to hear. And as I read in phraggy's thread, they can produce two flowers sometimes. I want to get rid of a few plants, so when I have more space (and don't buy too many orchids in the meantime ), maybe I'll make some room for a kovachii. I really loved my Fritz Schomburg when it bloomed and I'd like to have the parents as well.