I know a few teachers who work there. Are you a bilingual family? If so, then it seems like a reasonable idea. School is as good/bad as any state schools locally, it's not as 'good' as an independent if 'good' means small classes.
If you are not a bilingual family, then the feeling of the teachers I know (it might be just them, and not representative of all the staff), is that you are making school life tricky for your child. There are children who are SEN registered in one language, but not the other, for example, which might have self esteem and social impacts.
You'd also need to decide which language you want your child to be educated in at the school, and that can impact the experience your child has of education in general. Ie, the French side of things is very French, which is quite different to the German side of things. If you don't speak another language at home, then how will you make sure your child has opportunities to use it half of the time?
One of the friends who works there has sent her child there too, which is usually a good sign, but they are a bilingual family. They also moved nearby to ensure that friendships were easy to cultivate. The last few years have been fine with regard to the application process in terms of where you live - ie, even people living away from the admissions 'points' got in, but that's not always the case, so could be a bit of a gamble.