I've been twice, and unfortunately it was cloudy on my second trip.
The difference light quality makes to the experience is remarkable, and I implore anyone that visits to ensure you go at the right times on a clear sunny day.
You may think you've seen well lit stained glass before, but it's like freaking lazer beams of thick light penetrating the environment to the point where it doesn't seem natural.
I’m doing a nerdy Catholic project that calls for attending Mass at churches all over Chicago (https://www.dahosek.com/category/catholic-nerd-pilgrimage/) and one recent church had an east-facing wall that was entirely stained glass that was quite a dramatic effect during a morning Mass. The right combination of architecture, geography and weather can do some amazing things.
The difference light quality makes to the experience is remarkable, and I implore anyone that visits to ensure you go at the right times on a clear sunny day.
You may think you've seen well lit stained glass before, but it's like freaking lazer beams of thick light penetrating the environment to the point where it doesn't seem natural.