Bought one for my wife to improve comfort from old Thermarest. Seems as comfortable as my (much more expensive) Exped mat, and easy to inflate/deflate. Only time will tell how durable it is, but at the price we paid in the Alpkit sale we could replace it four times over and still have money for beer compared to the Exped version. I know what I will do next time. John.
In the time-honoured tradition of not actually answering the question you asked, I've had a Numo for a couple of years and have found it to be extremely comfortable and it is still in great nick. I have arthritis in my back so do suffer on lots of beds and this gives me a great night's sleep every time. As the dumo is thicker I reckon it'll be even better.