I started out with the cannula but if I my mouth opened even slightly during the night the air would go in my nose and out my mouth instead of into my lungs. It was a bizarre feeling that would wake me up immediately. I adapted pretty quickly (a day or two) to the mask. I agree with Nettdaddy, it sounds like they need to increase the pressure.
Are Roombas for the laziest people alive or what? Hanging out at my friends house and this dumb ass vacuum has been running for 36 mins so far and hasn't even finished the small kitchen yet. I had to move the bar stools as it kept just banging around between the stool legs. Edit - I could vacuum this kitchen in less than 3 mins and that includes getting the vac out of the closet.
RANT: Jungle Julia wanted a Roomba ever since we moved into this house, because only one room has carpet. So I finally got one for her a few years ago, AND SHE NEVER WANTS TO USE IT. She complains about it getting stuck, it trying to suck in electric cords, and of course, THE NOISE. Every time, I just want to say: "Bitch, you wanted this."