AS Yorkville rear outlet toilet

Hi,

I'd love to hear from others who have installed this toilet. I have one on order right now and I'm about to do the rough in for the drain. It looks like it takes a standard flange, although it is mounted in the wall, not the floor. I know not to use a wax ring. Is the Zurn Neo Seal the right one to use? It looks rigid - not squishable like a wax ring. I'd hate to have this toilet leak.

Any advice appreciated!

Thanks,
Amy