Bought this for overflow for quality AF and other expensive Cigars. Box is OK. Seasoning with 84% Boveda packs now. So too early to see if it seals well. As expected, the Hydrometer is an inaccurate piece of plastic junk, impossible to calibrate and unreliable. Tested it in a Daniel Marshall Humidor and it fails miserably, even after 2 salt tests and adjustments, today reading 90% Humidity in a 67% environment. Discarded this for a digital one to properly protect my cigars. Also discarded florist foam humidifier; these types never control humidity properly. They don't really control mold; as it almost always starts in the foam anyhow. Will put in 70% beads which you can buy "dry" , moisturize and save a bundle . These absorb and release moisture as needed to stabilize, unlike foam which only releases.