@snerkler
In all honesty, I've not really used it at night for your typical urban neon light type scenes so I can't honestly comment on that. I always used to fade the blacks anyway in editing to soften the look so loosing a bit of contrast with the Cinebloom over the 'black pro mist' wasn't a concern of mine either.
The Cinebloom comes in 10%, 20% & I think now they do a 5%.
The..... Cinesoft also comes in different strengths. Tide Optics! That's who make those - I was trying to think whilst typing!
As David says, have a search for images or some YouTube comparisons & try one out.
They are certainly my most used filter by far. Probably including CPL & ND's together!