A variable control provides fine tuning of mist output, and the dial on the lid allows you to direct the mist (away from curtains or bedding, for example). Even at a blast the sound is still barely audible.
This tank lies flat for easy filling, but might be a bit hard to reach into for cleaning. Still, the replaceable filter strains impurities out of the water, leaving the air clean. Pop open the lid on this cartridge you'll find a phone number for ordering replacements.