I installed this air heater to replace an older Eberspächer air heater.
The quality of the stove itself seems particularly good compared to Eberspächer (Vevor costs 15-20 times less).
The pump is also of good quality.
The installation was easy. The heater and pump fits 100% in the old fittings.
The control unit seems very cheap (it is too :-)) and I may well be worried about the durability.
The air heater started without problems and has so far been running for approx. 2 hours. Heats well. The noise is no more widespread than for the Eberspächer heater.