Got this humidifier for our baby shower in 2021 and have been using it quite frequently since. A full tank on high setting lasts for 12 hours - allowing our baby to breathe easily at her most stuffy times all night long! It is also so easy to use; our daughter is now 1.5 and likes to turn it on herself. Had to get a replacement part for this and customer service was so easy to deal with as well. The only thing to note, is to use distilled water so that your tank and parts don't get chlorinated.