I'm in the 3rd week of a 4 week trial, it wasn't free though. Cost was $400 for the 4 weeks and they give you an option to buy the machine off them at a supposed discount at the end. I have private health but of course it didn't cover the machine. It did cover the Private hospital and sleep study though. I just thought the 4 week trial was all part of it. The same mob that did the sleep study does the 4 week thing, so this set my scam detector off a bit!
My Oxygen levels dropped to 73% with an AHI of 44 and was diagnosed with asthma also (Been a long term smoker, but quit 4 months ago), so scary stuff. I've been a bit disappointed that I haven't seen instant results from the CPAP, but my AHI has now dropped to 0.9 so I guess its working? This getting older sucks knobs! The power use doesn't concern me a lot as we rarely camp more than one night in the same place. if need be, I'll throw another battery in to cover the use.