Donna N.
Very happy customer!
UPDATE: 2/13/22 I bought a backpack for the Inogen One G5 unit off of Amazon, and it has been a game changer. I work in a busy school environment, and being able to wear my G5 unit in a backpack has allowed me to have additional freedom and has taken the strain off my right shoulder. I no longer have to take my unit off to place it on the floor when I sit down to work just to have to pick it up again 5 minutes later to sling it over my shoulder when I have to stand. I have a double battery and a single battery. I charge them both at night and can make it through almost all the workday before I have to switch to the single battery. I'm on 2 liters. I am unable to plug my unit in at work to keep it charged as I am up and down too much to make that work. I plan to save up for another double battery, which will give me a combined total of about 22 hours of battery life between the three batteries (two double and one single). Original review: I have had my Inogen unit about 5 weeks now. I was hesitant about buying the Inogen portable concentrator, but the sales person (Marisa) couldn't have been more helpful. She was knowledgeable about the product, warranty, and usage, and she has quickly returned my calls for follow-up questions about the unit. I'm looking forward to my vacation this month. Before I received my portable concentrator, I dreaded having to take my home concentrator and multiple oxygen canisters on my trip and having to locate an oxygen company in each town to exchange the canisters. The Inogen concentrator will allow me to travel freely without those concerns.