We had an Anderson french door inswing installed today and are having the same problem. The sill is too high! Everyone is tripping over it. Our salesman’s answer is, “People need to watch where they walk.” My concern is that there will be nonstop injuries and that the threshold will be a constant problem. I definitely want a smoother, flatter threshold but they are saying that the only option is to put in a wheelchair ramp! My question is – can anyone direct me to actual photos of french door thresholds so that I can prove to these guys that there is such a thing as a flat threshold! (like the one they took out with my older french doors!) Thanks!