(4 out of 5) by Paul, CA

"I started using CPAP 2 months ago. This is the first machine I've used so I don't have anything to compare it to. It works fine. I love getting a good night's sleep now. I really like having the data card/software and printing out the data each day. That helps me to figure out how diet, stress, etc. affects my AHI (milk and dougnuts before bedtime is a bad idea). The humidifier does leak a bit. I put a towel under the machine. The amount of leak is inconsistent. Some nights there is no leak at all. When I pull the tank out in the morning and tip it on end, a little bit of water drips out between the two halves. That leads me to believe that the problem is with the O-ring. Sometimes it is hard to get the lid closed because the O-ring stretches (I can see it through the transparent tank). So I think a little care when reassembling the tank helps to minimize the leak. It also seems to be worse on cooler nights so condensation might be an issue. This machine had a note with it that said the hose elbow was no longer being shipped with the machine because it leaks. Since I don't have that elbow that's not the cause of the leaks on my machine. Some people have complained about this machine being noisy. I can see why they think that. It doesn't bother me though. It seems to be less noisy without the humidifier. There are some ducts in the tank that make the air flow across more of the surface area of the water. It's a great idea for getting more moisture into the air, but it might be causing some of the noise. I don't use C-Flex. My pressure is only 9 so I'm very comfortable without it. The couple of times I tried it my AHI went up. I would have to do some more testing to see if that's really the case or if something else was causing my AHI to go up on those nights. I really doubt that C-Flex was the problem. I haven't traveled with it yet, but the bag is nice and the machine is small enough that it shouldn't be a problem (just have to remember to take a small towel along). Summary: I like the machine. The data card and software is great for getting feedback about how things affect my apnea. I knocked off 1 star for the leaky humidifier problem."

(4 out of 5) by Jeff F.

"I just received my M-Series Pro w/humidifier as a replacement for the old "tank" Remstar Pro I had for 5 years. There are definitely some improvements with this new model but there are also some issues that need to be addressed.

Pros:
* The unit looks great, it has a low profile and fits nicely on the nightstand.

* The C-Flex feature is a nice addition for those that have trouble fighting the pressure during exhaling.

* The humidifier is easy to fill up and is nicely hidden. The dial on the humidifier is also a very nice touch.

* The Auto-On feature may scare you the first time you put your mask on - but its actually a cool feature. Now all I do is put the mask on and start breathing and the unit comes on.

Cons:
* I can deal with having the seperate power supply but having two cords dangling around seems sloppy to me. The old "tank" model simply had a crossover cord that attached the humidifier to the main unit.

* The unit is definitely noisier than my old Remstar Pro - especially if you have C-Flex enabled. Its not outrageous - but I have trouble believing Respironics claim that it is only 1db louder. My ears beg to differ.

* The lighted buttons are pretty bright at night. It makes for a nice nightlight even - but I know many people that cannot stand to have any kind of light in the bedroom at night. This should be an adjustable feature.

* The removeable Air Outlet Port that comes with the machine (this is not used when you have the humidifier attached) is just asking to be lost or damaged. The old humidifier on the Remstar Pro simply plugged into the air port like any cpap hose you would use.

This is still an excellent machine and I would recommend it to anyone. My old one lasted over 5 years - so you can bet its a quality unit."