For those with the Invacare or similar units. Are they continuous flow? Was the cost covered by Medicare or private insurance? If the cost was covered, did you have to jump through any hoops to get that done. I, so far, have only found one unit suitable for night use (due to need for continuous flow) and private insurance has not been willing to pay the increased cost, when compared with a stationary unit. Medicare (eligible in couple months) might pay at the same rate as for the larger units, but none of the durable med equipment suppliers locally want to mess with it because of the higher cost of the unit with no increase in reimbursement.
My stationary unit works fine, and I have bought one for the motorhome so we do not have to move the one from the stick and brick. Stationary units take a lot of power, however, and make boondocking problematic. I have an older technology portable (purchased) for use when we do not have shore power, but because it is not continuous flow it will alarm during sleep when you do not take a breath when it thinks you should. I could buy a new tech unit but am still trying to get insurance to cover it.