Alexandre
I have the G3 Inogen
I have the G3 Inogen and it's been a lifesaver. The major drawback is that it's heavy, as heavy as one of the small oxygen bottles that I used to carry with me when I went out. But, the unit itself has worked flawlessly and the battery lasts right at 6 hours as opposed to the portable bottle which lasts only 1 hour. All in all, I'm pleased with my purchase.



