I bought one in September.
It does work brilliantly I must say, the one terrible oversite with the construction of the Duo is that the plastic shell is so thin that within two weeks it had been accidentally smashed to bits. I did use parcel tape around it for a while but a few weeks ago it just fell to bits and is unusable. What a waste of £230-00 approx.
If only Sebo made the shell from the same thickness as the Sebo 36, it would be so much better. I think I will save up and buy an Envirodry some time next year.
If you buy one treat it with kid gloves!