We were on the Glory last week in cabin number 7446. Loved it!
I did feel vibration at night, but found it very soothing.
As for the balcony, we were only on it in the very early mornings. In the afternoons the sun became extremely too hot. Cannot comment on early evenings as we were still out partying! 😉
No smells.
The only issue we had was one day maintenance was sanding railings, and paint flakes rained onto the balcony. But this could happen anywhere on a ship. No big deal.