Hi, I live in Adliswil and two of my kids have gone through one of the two local Sekundarschulen (secondary schools) while the third is in the other one at the moment.
Overall the experience has been and is good. The school administration are approachable and helpful (in both German and English). The teachers of my children's classes were also good at their job and helpful.
There have been a couple of cases of bullying, in which my children were involved, and these were handled swiftly and thoroughly (to the point of one bully being moved to the other secondary school campus and being made to give a public apology before the rest of the school).
They have a high level of support for children with German as a second (or third or fourth) language, with varying support depending on the level needed. If your child also needs extra support for a specific, diagnosed learning difficulty then they act on that right away. They are good at catering for and effectively responding to children with medical conditions as well (one of my children has Type 1 diabetes, and they set up a clear medical response plan and informed all staff who worked with that child on how to respond if there was a problem).
The secondary schools now have more of an online presence than they did for my older children, obviously, which includes all teachers listing homework on the school's intranet (at least at my youngests' campus - they have separate principals, obviously, so there might be different specifics). That way, if your child "can't remember" what their homework is, they can log in to check. Some homework can also be submitted through the intranet.
I haven't been involved in primary schools or kindergartens in the area, so can't help you there if you have younger children. I'm pretty sure they also have several school campuses for this age. Check
the Adliswil schools' website, if you haven't already ...