I've been using this for six years now, and I haven't found a better one to take it's place. What I like:
"Silky smooth" pressure ramp
Whisper quiet operation, even when blowing at 20.
The humidifier is front loading and easy to remove.
The filters last a long time, even with weekly cleaning.
Easy, intuitive menu.
Durability - I travel with it about seven times a year.
Prevents (rain-out). This is not a major issue for me because I use two layers of insulation which adds negligible weight.
The only disadvantage is that it's larger and heavier than competing products.
By Eric, Northern California
I really can't believe the difference this BiPAP machine has made. My sleep has really improved and I feel a lot more rested. Wish I had gotten the heated tubing. By Bedguy, MN