I took the family to his winter solstice about 2 years ago. Unfortunately the cathedral was still under repairs from a fire, so half of it was still closed off. What was open was still huge. It's all open now and should be truly grand.
I remember that I wanted to see this show for many years, but due to the constraints the show I saw didn't have the full treatment with dance troupes and such. It should be back to normal now I think.
Bob