The shipping-time ist long, very long to germany. But the product works perfect at a Vaillant aroTherm 105. The update-procedure for the firmware is good documented und works perfect. Good electronic design with adum5211. Ordered mine with LAN-shield, but - heaven or hell - why is the case not modified for this combination? To get it working in HomeAssistant / ebusd / mqtt it is important to put this URI into the configuration of its web-interface: mqtt://HA-Username:HA-Userpassword@IP-Adress:1883 So I got it working very well. BR