They are building a wooden coaster with a barrel roll, which is something that has never been done before. The closest thing to this was the now defunct Son of Beast at Kings Island in Ohio. Hopefully this will be a lot smoother than Son of Beast, though, because that ride was punishing. You had to really want to ride it to get on it.
With a steel overlay on this track, it should remain smooth for years and from the description, it sounds like it’s using the terrain which is always a good thing as far as coasters are concerned.