the most relevant positive review
Although the website had cautioned that deliveries in the UK may take up to 10 days, my AirMini bundle arrived the next working day and was very well packaged.
The device is amazingly small compared to a normal CPAP machine with humidifier, and I am looking forward to not having an additional piece of hand luggage when travelling - it will fit easily in hand luggage.
A one night test found the device easy to connect to my phone via Bluetooth (though that is not mandatory - it will work without). It was quiet in operation - very slightly noisier than my existing 5 year old machine - and could provide quite powerful airflow if needed.
I've not had to contact ResMed at all, so can't comment on customer service but judging by the quality of everything I am anticipating it will be good.