Thanks guys!
Last year we used only vermiculite and we wanted to try the grates this year. Lucky's clutch had 2 eggs I couldn’t separate and they were on top of each other so I had to build a little shelf with the vermiculite.
So far that and the singles will roll if they are not surrounded by its neighbors are the only down fall I've found with the grates.
We will see I will definitely let you know which I like better.