I'm in a bit of a quandary about this myself.
I liked my Eberspacher D2 Airtronic and didn't find it noisy at all, but at £600 not cheap to buy.
The Planar imported from China looks a very good deal at better than half that price, but support from seller will in reality be non-existant (not practical to send back or wait on parts), so even at the attractive price is still a bit of a punt.
The price of the UK supplied Planars are very close to the established market leading heater so enough reason to try? Not in my eyes.
And the question on CE markings and appropriate REGISTERED safety standards on the direct imports does make them a potential risk I guess.
Probably be sticking to installing the tried and tested Eber in January I would think.
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