Ive started out with openHAB2. I was using a Ethernet gateway and tested the mysensors binding but found the combo was too limited. I much prefer having the MQTT gateway and the data be accessible to anything that subscribes, although I also now use openHAB to republish its item changes to MQTT as well which is probably a better approach. I don't think the main new features in version 2 are very mature at the moment as well, discovered things for example get put in to a non human readable database and the web ui's are not fully functional. With that being said I'm using node red to provide node ID's and configuring items manually and since beta3 it's been solid as a rock.