I was there around 3pm when the last of the rings was being put into place.
In person, it doesn't look any more impressive than the coaster itself. It wasn't lit up last night, and that's when it should really look impressive as the illuminated trains go up through the rings.
I don't know if the rings will light up as the trains pass them or if they will be on all of the time, but it's definitely going to be a pretty visual to be heading straight up through these things.