I've read the reviews mentioning the excessive noise and I don't agree that the noise is excessive. I personally don't find much, if any, noisier than my home unit, which is a Respironics Dreamstation.
It is much smaller and handier than the home unit for travelling use. I use it for motorcycle touring and the smaller size is greatly appreciated.
The folks at CPAP Exchange we're more than helpful and my machine arrived in perfect condition and almost overnight! Excellent service and the best price I found out there.
Perhaps the only suggestion would be the addition of the humidifier.