I would never use a toilet with a rim again! It is more hygienic, nothing smells and if there is, wiping over it is much easier. And no, nothing splashes out, maybe once with a very big deposit, but that was the case with the old one as well.
I think our o.Novos have no coating, but they still look like new due to regular cleaning. However, there are many different versions, maybe some of them have a coating.