This is my first hatch, so I have no basis for comparison.
It seems that, after they throw off the "lid" that they zipped out, it's a bit of an effort for them to lift themselves up out of the cup that's left. I can see where it might be easier for them if the egg was laying on it's side so they could ... well, more like wallow out, instead of lurch out.
That said, so far so good. Three zipped and three out. And they aren't rolling around. And they stay upright so I can see full circle of the zip and keep track of the progress.
I read somewhere to cut little holes in the bottom of each cup for drainage, just in case. I haven't had any drainage for the holes, but I guess it's better that it's there. I also used styrofoam cartons just like these, holes and all, and hotglued a 10" piece of 3/4" PVC pipe longways underneath, between the two rows of egg cups, for incubation. For turning, I just leaned up the lid on my bator, and leaned the whole carton to the other side. Basically a 90* turn, but fast fast fast, because one lean moves up to a dozen eggs. I can fit three egg cartons into my LG Still Air at a time.