Has anyone here ever used a portable oxygen concentrator? I've been seeing a lot of commercials lately for a company called Open-Aire - and they offer portable oxygen concentrators. The one they show on their site and on their commercials is an Evergo. I've lots of other sites on the web that sell this kind equipment but I have not seen many people offer their reviews as to how it works for them as an oxygen user. My doctor does not have other patients with first-hand experience of the equipment either.
I myself have been using oxygen tanks for almost a year. My liter flow is usually set to 2, but when I'm doing a lot of walking I have to raise it to 3. A lighter alternative that does not have to be refilled is very appealing. However before I go further I'd like to talk to someone who has one - an Evergo or other model. Mainly I'd like to know how the pulse setting works for you, and if it works as well as I hope it does.