The shop provided excellent service and shipped the product promptly. In Japan, a doctor's certificate is required to import a CPAP machine; although I received an inquiry from the authorities during customs clearance, I was able to clear it successfully after submitting the necessary documents. I had previously been using an older BiPAP machine from a Dutch company, so switching to a CPAP felt a bit strange at first due to the resistance during exhalation, but I found it comfortable to use once I set a longer "Ramp Time." I was also impressed by the technological advancement, as the unit operates so quietly that the sound is barely audible.