I bought my XT CPAP machine from CPAP1000 several years ago. After using the machine without a humidifier for several years, I decided to give it a try as I found that during the winter, the cool dry air was irritating my sinus'. So far it has been great. It only took a few days for the humidifier to arrive. The device seems to be well built and connecting to my CPAP was simple. It is a bit tricky to remove the tank for cleaning and filling, but once I got the hang of it, it was pretty simple. I definitely will buy from CPAP1000 again and would recommend this humidifier and the XT series CPAP machine. As for the CPAP itself, I have two, one for home and one to travel. The travel one has been all around the world from China, to Japan, Europe, South Korea, New Zealand and many other places. It has been great.