I knew two families who had dc at that school and they seemed happy with it, one American family, one Russian family. We have moved on and I am no longer in touch with them now though.
I was told there was zero tolerance of bullying which is not something I would say about Berlin schools in general, so that is a definite plus. It is a nice area, very green and residential, close to the forest and outside of the city centre but not far outside. I haven't been inside the school grounds so can't comment on the facilities or the buildings. The school is guarded. I don't know how you feel about that (armed police) and there is a high wall with surveillance cameras but I don't think the dc really pick up on it. It is right next to a tennis club which belongs to one of the universities and accessible by SBahn (Berlin local transport train but overland, as opposed to UBahn which is the subway, so less frequent than the UBahn but not inconvenient for getting to school unless they go on strike which they tend to do mid winter). Many dc travel to school alone but not in the first couple of years. The school also has a school bus service, so your dc can be picked up and brought home.
You will probably find that there is a large Russian contingent at the school which reflects the considerable influx of Jewish people from Russia in the past 15 years or so. You will probably see this in any Jewish institution in the city these days. I remember that one mother told me the school was not all that Jewish (in that it is open to non-Jewish children and many of the teaching staff were not Jewish at that time, I don't know about now). So it is perhaps not comparable to a Jewish school in the UK.
The children learn Hebrew from year 1, so if your dc don't have Hebrew knowledge already, you'd need to talk to the school about how to handle that. I believe they will support your dc catching up. I am sure your dc could do this if necessary, when the rest of the class has English lessons.
They will base your fees on the previous year's income tax details. I am sure they will be able to translate whatever information you give them. They base their calculations on the German Steuerbescheid which is what you get back from the tax office every year. I am sure they have had other families coming in from abroad and will be used to working around this, in particular they should have no problem with paperwork in English. Perhaps you could mail them and ask if you could have an appointment to call and ask some questions. The school secretary might not speak English but I am sure the Head will.
There is also another Jewish primary school in Berlin (Or Avner) but more Orthodox I believe here . I don't know anything about it.