After seven weeks, I'm very satisfied.  Power consumption and performance: according to the instructions. Volume is a bit higher. Accessibility via Wi-Fi is no problem at all; the touchscreen control unit has a VERY long cable - great.  Service: Very good accessibility via chat, replies within a few hours. Detailed technical documentation is provided for buyers before you buy, so you can check in detail if the heat pump is sufficient.You can access/configure about 250 parameters in detail using login-code you can obtain from the seller! Cant get any better.   Delivery to Germany included all formalities and fees, as agreed.  I don't think you can get more performance for this price. I'm considering buying a second one to have one in reserve. Gonna update this rating here if anything happens in the future. 

Not insatalled yet, but product looks very good and promissing.