I agree with Paul - the Mountain High systems are great. Good company to work with, the parts came on time, the installation was straightforward and it works great. It's surprising how little O2 is used when flying "down low" at 12,000 feet. Makes one tempted to use it a lot more - which is a good thing.
Gary Casey
ps: Get a blood
saturation monitor. That is a good guide to when to use it.
I inherited my system with the Legacy and it warns me when I start breathing through my mouth instead of the cannula. It certainly would help detect a low tank or stopped flow. On a number of flights where I am busy with flying I've heard the warning and it has helped prevent problems. I agree these units are great.
Paul
Legacy RG