AT first glance it has decent reviews, so who knows.
Many thermometers that are built in to the incubator are off straight out of the box.
Years ago when I bought a brinsea octagon incubator, I had to adjust it as well.
I learned this all after scouring BYC...
Let me just say, you are not alone! I also have guilt and I know most people on the hatching forums have failers! It’s often on the ones we want to hatch the most that seem to break our hearts!
I have never hatched duck eggs, only chicken, quail and turkey eggs. IF I recall correctly I believe...