Exactly as described. The code accessible doors make initial entry really easy and makes life easier for larger groups afterwards (just don't come back tipsy and really needing a bathroom, then it is impossbile to put in the right code:).
The property is great for large groups. You get four separate studios with their own bathroom and shower. The common room and the yard takes care of the social part. The downstairs cafe house has great breakfast and they are realy helpful too.
Two warnings:
1. Because of the acoustics of the courtyard, even a conversation at a normal volume in a room with an open window sounds quite loud (it is a quite neighbourhood). We had to warn the kids a couple of times to be really quiet after ten. This also goes the other way, if you want to sleep in after nine in the morning, the cafe customers' conversations will be in your room. Not a big deal but if you are the late sleeping or loud kind of group, beware. Note that this is a summer problem, when the windows are closed, the sound isolation is very good.
2. The pillows provided are the German type soft squares. You can fold them into eight and they still seem to be of the same thickness. If you are fussy about your pillow, you may need to bring your own or buy one for around 8-10 Euros in Berlin.
Overall, a great experience.