Hi everyone. I'm a engineering university student at the Australian National University and I'm doing a research project about sleep apnea and how to improve the CPAP machine. I'm conducting a survey about user satisfaction of using a CPAP machine. If you have at any time used a CPAP machine I would be really grateful if you could fill it out (link below). It's only four questions (3 multiple choice). The information collected is completely anonymous and information will not be distributed. Information will only be used for the purposes of my assignment. Thank you for your time.