Looks really promising for people who don't like stimulants or can't take them for other reasons, slowly gaining popularity as well. Unfortunately not yet approved for adults in Europe, or I would have tried it. I'm fine with stimulants, but I'm a little wary of the effects on heart health over decades and I would like my appetite back. I also dislike that with stimulants I don't have any attention span in the evening, guanfacine provides more of a steady effect from what I can tell.
There's also clonidine which has roughly the same mechanism of action as guanfacine and has been used for ADHD for a long time.
It could be that the EMA has approved it for everyone, but Germany is more restrictive. It's been my experience that Germany as a society is terrified of medicine, and takes forever to adopt new drugs. They also have an attitude towards ADHD in particular that it's just for children, until somewhat recently you couldn't even be diagnosed as an adult here. Even today if you get diagnosed as an adult many doctors will demand "documentation" showing you were affected by ADHD as a child, some even want to speak with your parents.