Not for technology layman, let prefer to install by an expert

The valve makes a high impression. But for the installation, I draw from a star. It is incomprehensible that there Grohe simply fails to mark the two connecting hoses so clear that you can connect hot and cold inlet same right side up. The installation guide is a joke. I dare say that a less technically skilled end user, the valve will not connect correctly the first time.
The automatic recirculation of the flushing hose as described often, not as smooth as desired. To achieve this, tact and time is needed.
Otherwise, the valve makes a high quality impression.