Thanks Coriander for starting the thread. I have a DeVilbiss SleepCube that I use, without a humidifier. I have only tried it on a flight once, Hong Kong to Toronto on a CX 777, and it didn't "feel right". I have always been a bad sleeper on planes - admittedly in Y before the last few years - so I just sit up and watch the IFE and nap for a little bit.
I did wonder if using it on a B787 or A350 with their higher cabin pressures might improve the experience.
