Thanks all! As it turns out my supplier (Apria HC) does not sell the Intellipap....so it's time to upgrade to the M-Series w/A-Flex. My C-Flex has worked well and I'm looking forward to the "M".

Time for a new machine...and I can't decide between the two. I've read most of the reviews on this site and I'm leaning toward the Intellipap unit....but I really like the exhale relief of the C-Flex unit I have now...and would have on the A-Flex. Is the exhale relief a big deal?....thanks for your ...

I've been using a Remstar + for about a year and I'm only getting about 3 hours sleep per night because I fill up with air (like the Michelen man). I've tried a chin strap to no avail....might the Auto/C-flex design increase my sleep time? Thanks, Noheir