Some of what I would want to say has been said already. Childcare provision for under-3s is much much better in Berlin and in what used to be East Germany. I once read that 50% of children between 1 and 3 go to childcare of some sort in Berlin, but in Bavaria the figure is more like 5%. Very few children go to nursery under a year old, partly because the maternity (and paternity) provisions are so good in the first year.
We ended up trying out a range of Kita/childcare options, due to moving districts within Berlin. DD1 went to an under-3 nursery (Krippe run by the Protestant Church/Evangelische Kirche) and then a large state-run nursery until she started Vorschule. DD2 went to a Tagesmutter (childminder) who had 5 2-yr-olds in her own home, then moved to a largeish bilingual Montessori nursery.
"As I understand it you apply through the Jungendamt, and they pretty much assign you - you don't get much choice, though you can turn down one and wait to be assigned another." Not in Berlin - we answered an advert on the wall of the Jugendamt, went for a visit, liked what we saw, and then registered. I think the system depends on where you are.
We found that it was VERY unusual to get provision for longer than 8 to 9 hours per day. Our childminder shut at 3 pm each day (started at 7.30), and even in the larger nurseries they shut by 5pm. Some nurseries stayed open later, but they weren't necessarily the nicest places. Oh, and it's almost impossible to get provision just for two or three days a week in state nurseries - they operate on the principle that you want the same (limited) number of hours each day, so if you work full days twice a week, you're stuffed, essentially.
We found that nurseries shut for 3 weeks in summer - either the first or second half of the school holidays. Luckily that always fitted in with us, but for some people it must be a huge strain finding alternative care.
However, the plus side of childcare here is that it is so heavily subsidised. We never paid more than 150 euros monthly for full-time care (9 hours daily).
Now our kids are older and in school, we've worked out that the majority of working parents arrange their working hours so one parent drops off and goes to work, then works later, while the other one starts work early and then does the pick up. It seems to be quite unusual for both parents to work full-time, though - often at least one parent is on 30 hours. Our school is a Ganztagsschule from 8 to 4, with extra provision (paid for by parents) until 6 pm if necessary. However, out of a school of 350 pupils, on an average day 10 will stay after 4 pm.
DH has quite unreliable and irregular working hours, so I ended up changing my career totally so I could work freelance from an office at home, meaning that I am always there for the DC, both after school and during the holidays.