It works great!
I bought this bubble humidifier after watching a How-To video on YouTube on how to set up and use this on an Everflo Concentrator. I suffer from Sleep Apnea and use a concentrator to help me breath at night, but would wake up frequently with a dry nose and throat, along with a headache. This humidifier helps a lot! I am glad I bought it and highly recommend it!
Rating: 5 stars