I repent the day I bought my Philips Respironics System One BiPAP. The only thing it has given me is trouble and more trouble. The unit has been switched more than four times by DME, and the same nagging problem crops up. The problem is this – Philips Respironics System One shuts off while I am fast asleep and I end up having a suffocated feeling and a steady beep in the background. I have to get up, unplug the unit, replug and go to sleep…if lucky, then I would get an hour’s sleep. On top of it, the DME is behaving as if I am the person responsible for the unit’s problems and there is simply no problems at all with BiPAP machine. It takes them almost 48 hours to respond to a question, and during this, I am without the device at all. Can somebody help me with this? I am at my wits end in trying to figure out what to do. Calling Philips was a sheer waste of money as they merely said: “Get in touch with your local DME.” As if I had not done that already.